diff --git a/models/recruit/src/index.ts b/models/recruit/src/index.ts
index f60f031f9f..761c262bd9 100644
--- a/models/recruit/src/index.ts
+++ b/models/recruit/src/index.ts
@@ -619,7 +619,6 @@ export function createModel (builder: Builder): void {
         space: recruit.class.Vacancy
       }
     ],
-    assignee: contact.class.Employee,
     _id: {
       related: [tracker.class.Issue, 'relations._id']
     }
diff --git a/models/tracker/src/index.ts b/models/tracker/src/index.ts
index 7f4a5c600e..9336918377 100644
--- a/models/tracker/src/index.ts
+++ b/models/tracker/src/index.ts
@@ -595,7 +595,7 @@ export function createModel (builder: Builder): void {
           props: { listProps: { key: 'modified', fixed: 'left' } }
         },
         {
-          key: '$lookup.assignee',
+          key: 'assignee',
           presenter: tracker.component.AssigneePresenter,
           props: { defaultClass: contact.class.Employee, shouldShowLabel: false }
         }
@@ -675,7 +675,7 @@ export function createModel (builder: Builder): void {
           props: { listProps: { fixed: 'right', optional: true } }
         },
         {
-          key: '$lookup.assignee',
+          key: 'assignee',
           presenter: tracker.component.AssigneePresenter,
           props: { defaultClass: contact.class.Employee, shouldShowLabel: false }
         }
@@ -726,7 +726,7 @@ export function createModel (builder: Builder): void {
           props: { listProps: { fixed: 'right' } }
         },
         {
-          key: '$lookup.assignee',
+          key: 'assignee',
           presenter: tracker.component.AssigneePresenter,
           props: { defaultClass: contact.class.Employee, shouldShowLabel: false }
         }
@@ -1783,7 +1783,7 @@ export function createModel (builder: Builder): void {
         { key: '', presenter: tracker.component.SprintDatePresenter, props: { field: 'startDate' } },
         { key: '', presenter: tracker.component.SprintDatePresenter, props: { field: 'targetDate' } },
         {
-          key: '$lookup.lead',
+          key: 'lead',
           presenter: tracker.component.SprintLeadPresenter,
           props: {
             _class: tracker.class.Sprint,
diff --git a/packages/kanban/src/components/Kanban.svelte b/packages/kanban/src/components/Kanban.svelte
index 7261fea82e..3876af7b30 100644
--- a/packages/kanban/src/components/Kanban.svelte
+++ b/packages/kanban/src/components/Kanban.svelte
@@ -325,6 +325,7 @@
             <KanbanRow
               bind:this={stateRows[si]}
               on:obj-focus
+              index={si}
               {groupByDocs}
               {stateObjects}
               {isDragging}
diff --git a/packages/kanban/src/components/KanbanRow.svelte b/packages/kanban/src/components/KanbanRow.svelte
index 22dabf9c65..40a750fa08 100644
--- a/packages/kanban/src/components/KanbanRow.svelte
+++ b/packages/kanban/src/components/KanbanRow.svelte
@@ -17,7 +17,8 @@
   import ui, { Button, IconMoreH, mouseAttractor } from '@hcengineering/ui'
   import { createEventDispatcher } from 'svelte'
   import { slide } from 'svelte/transition'
-  import { CardDragEvent, Item } from '../types'
+  import { CardDragEvent, DocWithRank, Item } from '../types'
+  import Spinner from '@hcengineering/ui/src/components/Spinner.svelte'
 
   export let stateObjects: Item[]
   export let isDragging: boolean
@@ -27,6 +28,7 @@
   export let selection: number | undefined = undefined
   export let checkedSet: Set<Ref<Doc>>
   export let state: CategoryType
+  export let index: number
 
   export let cardDragOver: (evt: CardDragEvent, object: Item) => void
   export let cardDrop: (evt: CardDragEvent, object: Item) => void
@@ -53,7 +55,20 @@
 
   let limit = 50
 
-  $: limitedObjects = stateObjects.slice(0, limit)
+  let limitedObjects: DocWithRank[] = []
+  let loading = false
+
+  function nop (op: () => void, timeout: number) {
+    op()
+  }
+
+  $: {
+    loading = true
+    ;(limitedObjects.length > 0 ? nop : setTimeout)(() => {
+      limitedObjects = stateObjects.slice(0, limit)
+      loading = false
+    }, index * 2)
+  }
 </script>
 
 {#each limitedObjects as object, i (object._id)}
@@ -88,19 +103,23 @@
 {/each}
 {#if stateObjects.length > limitedObjects.length}
   <div class="step-tb75">
-    <div class="card-container h-18 flex-row-center flex-between p-4">
-      <span class="p-1">
-        {limitedObjects.length}/{stateObjects.length}
-      </span>
-      <Button
-        size={'small'}
-        icon={IconMoreH}
-        label={ui.string.ShowMore}
-        on:click={() => {
-          limit = limit + 20
-        }}
-      />
-    </div>
+    {#if loading}
+      <Spinner />
+    {:else}
+      <div class="card-container h-18 flex-row-center flex-between p-4">
+        <span class="p-1">
+          {limitedObjects.length}/{stateObjects.length}
+        </span>
+        <Button
+          size={'small'}
+          icon={IconMoreH}
+          label={ui.string.ShowMore}
+          on:click={() => {
+            limit = limit + 20
+          }}
+        />
+      </div>
+    {/if}
   </div>
 {/if}
 
diff --git a/packages/ui/src/components/Scroller.svelte b/packages/ui/src/components/Scroller.svelte
index 4ffe043876..efa0e7fb17 100644
--- a/packages/ui/src/components/Scroller.svelte
+++ b/packages/ui/src/components/Scroller.svelte
@@ -392,6 +392,9 @@
         }
 
         delayCall(() => {
+          if (divBox === undefined) {
+            return
+          }
           const tempEls = divBox.querySelectorAll('.categoryHeader')
           observer = new IntersectionObserver(checkIntersection, { root: null, rootMargin: '0px', threshold: 0.1 })
           tempEls.forEach((el) => observer.observe(el))
diff --git a/plugins/contact-resources/src/components/Avatar.svelte b/plugins/contact-resources/src/components/Avatar.svelte
index 873c657a7a..d84e61ffa6 100644
--- a/plugins/contact-resources/src/components/Avatar.svelte
+++ b/plugins/contact-resources/src/components/Avatar.svelte
@@ -101,8 +101,12 @@
         bind:this={imageElement}
         on:load={(data) => {
           if (imageElement !== undefined) {
-            accentColor = imageToColor(imageElement)
-            dispatch('accent-color', accentColor)
+            try {
+              accentColor = imageToColor(imageElement)
+              dispatch('accent-color', accentColor)
+            } catch (err) {
+              // Ignore
+            }
           }
         }}
       />
@@ -114,8 +118,12 @@
       bind:this={imageElement}
       on:load={(data) => {
         if (imageElement !== undefined) {
-          accentColor = imageToColor(imageElement)
-          dispatch('accent-color', accentColor)
+          try {
+            accentColor = imageToColor(imageElement)
+            dispatch('accent-color', accentColor)
+          } catch (err) {
+            // ignore
+          }
         }
       }}
     />
diff --git a/plugins/contact-resources/src/components/EmployeePresenter.svelte b/plugins/contact-resources/src/components/EmployeePresenter.svelte
index 1d5948e9cc..104f8e2ce2 100644
--- a/plugins/contact-resources/src/components/EmployeePresenter.svelte
+++ b/plugins/contact-resources/src/components/EmployeePresenter.svelte
@@ -1,13 +1,13 @@
 <script lang="ts">
   import { Employee } from '@hcengineering/contact'
-  import { WithLookup } from '@hcengineering/core'
+  import { Ref, WithLookup } from '@hcengineering/core'
   import { IntlString } from '@hcengineering/platform'
   import { IconSize } from '@hcengineering/ui'
-  import { PersonLabelTooltip } from '..'
+  import { PersonLabelTooltip, employeeByIdStore } from '..'
   import PersonPresenter from '../components/PersonPresenter.svelte'
   import contact from '../plugin'
 
-  export let value: WithLookup<Employee> | null | undefined
+  export let value: Ref<Employee> | WithLookup<Employee> | null | undefined
   export let tooltipLabels: PersonLabelTooltip | undefined = undefined
   export let shouldShowAvatar: boolean = true
   export let shouldShowName: boolean = true
@@ -21,11 +21,13 @@
   export let accent: boolean = false
   export let defaultName: IntlString | undefined = undefined
   export let element: HTMLElement | undefined = undefined
+
+  $: employeeValue = typeof value === 'string' ? $employeeByIdStore.get(value) : value
 </script>
 
 <PersonPresenter
   bind:element
-  {value}
+  value={employeeValue}
   {tooltipLabels}
   onEdit={onEmployeeEdit}
   {shouldShowAvatar}
@@ -37,6 +39,6 @@
   {colorInherit}
   {accent}
   {defaultName}
-  statusLabel={value?.active === false && shouldShowName ? contact.string.Inactive : undefined}
+  statusLabel={employeeValue?.active === false && shouldShowName ? contact.string.Inactive : undefined}
   on:accent-color
 />
diff --git a/plugins/recruit-resources/src/components/KanbanCard.svelte b/plugins/recruit-resources/src/components/KanbanCard.svelte
index eca5233b7b..d471a6d2d7 100644
--- a/plugins/recruit-resources/src/components/KanbanCard.svelte
+++ b/plugins/recruit-resources/src/components/KanbanCard.svelte
@@ -68,7 +68,7 @@
     <div class="tool mr-1 flex-row-center">
       {#if !dragged}
         <div class="mr-2">
-          <Component is={notification.component.NotificationPresenter} props={{ value: object }} />
+          <Component showLoading={false} is={notification.component.NotificationPresenter} props={{ value: object }} />
         </div>
       {/if}
     </div>
@@ -76,6 +76,7 @@
       <div class="tool mr-1 flex-row-center">
         <div class="step-lr75">
           <Component
+            showLoading={false}
             is={contact.component.ChannelsPresenter}
             props={{ value: channels, object: object.$lookup?.attachedTo, length: 'tiny' }}
           />
@@ -89,7 +90,7 @@
         <div class="mr-2">
           <ApplicationPresenter value={object} />
         </div>
-        <Component is={tracker.component.RelatedIssueSelector} props={{ object }} />
+        <Component showLoading={false} is={tracker.component.RelatedIssueSelector} props={{ object }} />
       </div>
       <DueDatePresenter
         value={object.dueDate}
@@ -115,7 +116,7 @@
       {/if}
     </div>
     <AssigneePresenter
-      value={object.$lookup?.assignee}
+      value={object.assignee}
       issueId={object._id}
       defaultClass={contact.class.Employee}
       currentSpace={object.space}
diff --git a/plugins/task-resources/src/components/AssigneePresenter.svelte b/plugins/task-resources/src/components/AssigneePresenter.svelte
index 9db5c0a691..ea7f9a18bb 100644
--- a/plugins/task-resources/src/components/AssigneePresenter.svelte
+++ b/plugins/task-resources/src/components/AssigneePresenter.svelte
@@ -17,14 +17,14 @@
   import { Class, Doc, Ref, Space } from '@hcengineering/core'
   import { Task } from '@hcengineering/task'
   import { getClient } from '@hcengineering/presentation'
-  import { UsersPopup } from '@hcengineering/contact-resources'
+  import { UsersPopup, employeeByIdStore } from '@hcengineering/contact-resources'
   import { AttributeModel } from '@hcengineering/view'
   import { eventToHTMLElement, showPopup } from '@hcengineering/ui'
   import { getObjectPresenter } from '@hcengineering/view-resources'
-  import { IntlString } from '@hcengineering/platform'
+  import { IntlString, getEmbeddedLabel } from '@hcengineering/platform'
   import task from '../plugin'
 
-  export let value: Employee | null | undefined
+  export let value: Ref<Employee> | Employee | null | undefined
   export let issueId: Ref<Task>
   export let defaultClass: Ref<Class<Doc>> | undefined = undefined
   export let currentSpace: Ref<Space> | undefined = undefined
@@ -33,13 +33,15 @@
   export let defaultName: IntlString | undefined = undefined
   export let placeholderLabel: IntlString | undefined = undefined
 
+  $: employeeValue = typeof value === 'string' ? $employeeByIdStore.get(value) : value
+
   const client = getClient()
 
   let presenter: AttributeModel | undefined
 
-  $: if (value || defaultClass) {
-    if (value) {
-      getObjectPresenter(client, value._class, { key: '' }).then((p) => {
+  $: if (employeeValue || defaultClass) {
+    if (employeeValue) {
+      getObjectPresenter(client, employeeValue._class, { key: '' }).then((p) => {
         presenter = p
       })
     } else if (defaultClass) {
@@ -84,12 +86,12 @@
       UsersPopup,
       {
         _class: contact.class.Employee,
-        selected: value?._id,
+        selected: employeeValue?._id,
         docQuery: {
           active: true
         },
         allowDeselect: true,
-        placeholder: task.string.AssignThisTask
+        placeholder: placeholderLabel ?? presenter?.label ?? task.string.AssignThisTask
       },
       eventToHTMLElement(event),
       handleAssigneeChanged
@@ -108,7 +110,7 @@
     shouldShowName={shouldShowLabel}
     onEmployeeEdit={handleAssigneeEditorOpened}
     tooltipLabels={{
-      personLabel: value ? getName(value) : undefined,
+      personLabel: employeeValue ? getEmbeddedLabel(getName(employeeValue)) : undefined,
       placeholderLabel: placeholderLabel ?? presenter.label
     }}
   />
diff --git a/plugins/task-resources/src/components/kanban/KanbanView.svelte b/plugins/task-resources/src/components/kanban/KanbanView.svelte
index c1228698a3..3f9dcded54 100644
--- a/plugins/task-resources/src/components/kanban/KanbanView.svelte
+++ b/plugins/task-resources/src/components/kanban/KanbanView.svelte
@@ -14,7 +14,6 @@
 // limitations under the License.
 -->
 <script lang="ts">
-  import contact from '@hcengineering/contact'
   import {
     CategoryType,
     Class,
@@ -133,7 +132,6 @@
       ...options,
       lookup: {
         ...options?.lookup,
-        assignee: contact.class.Employee,
         space: task.class.SpaceWithStates,
         state: task.class.State,
         doneState: task.class.DoneState
diff --git a/plugins/tracker-resources/src/components/components/ComponentTimeline.svelte b/plugins/tracker-resources/src/components/components/ComponentTimeline.svelte
index cc0ba3be60..9ddc26fcf6 100644
--- a/plugins/tracker-resources/src/components/components/ComponentTimeline.svelte
+++ b/plugins/tracker-resources/src/components/components/ComponentTimeline.svelte
@@ -13,10 +13,9 @@
 // limitations under the License.
 -->
 <script lang="ts">
-  import contact from '@hcengineering/contact'
   import { Class, Doc, FindOptions, getObjectValue, Ref, Timestamp } from '@hcengineering/core'
   import { getClient } from '@hcengineering/presentation'
-  import { Issue, Component } from '@hcengineering/tracker'
+  import { Component, Issue } from '@hcengineering/tracker'
   import { CheckBox, Spinner, Timeline, TimelineRow } from '@hcengineering/ui'
   import { AttributeModel, BuildModelKey } from '@hcengineering/view'
   import { buildModel, LoadingProps } from '@hcengineering/view-resources'
@@ -37,7 +36,6 @@
 
   const baseOptions: FindOptions<Issue> = {
     lookup: {
-      assignee: contact.class.Employee,
       status: tracker.class.IssueStatus
     }
   }
diff --git a/plugins/tracker-resources/src/components/components/ComponentsList.svelte b/plugins/tracker-resources/src/components/components/ComponentsList.svelte
index cfb2f49731..aedebda51a 100644
--- a/plugins/tracker-resources/src/components/components/ComponentsList.svelte
+++ b/plugins/tracker-resources/src/components/components/ComponentsList.svelte
@@ -13,10 +13,9 @@
 // limitations under the License.
 -->
 <script lang="ts">
-  import contact from '@hcengineering/contact'
   import { Class, Doc, FindOptions, getObjectValue, Ref } from '@hcengineering/core'
   import { getClient } from '@hcengineering/presentation'
-  import { Issue, Component } from '@hcengineering/tracker'
+  import { Component, Issue } from '@hcengineering/tracker'
   import { CheckBox, Spinner, tooltip } from '@hcengineering/ui'
   import { BuildModelKey } from '@hcengineering/view'
   import { buildModel, LoadingProps } from '@hcengineering/view-resources'
@@ -37,7 +36,6 @@
 
   const baseOptions: FindOptions<Issue> = {
     lookup: {
-      assignee: contact.class.Employee,
       status: tracker.class.IssueStatus
     }
   }
diff --git a/plugins/tracker-resources/src/components/issues/AssigneePresenter.svelte b/plugins/tracker-resources/src/components/issues/AssigneePresenter.svelte
index baadebe4de..ada8871372 100644
--- a/plugins/tracker-resources/src/components/issues/AssigneePresenter.svelte
+++ b/plugins/tracker-resources/src/components/issues/AssigneePresenter.svelte
@@ -14,17 +14,17 @@
 -->
 <script lang="ts">
   import contact, { Employee } from '@hcengineering/contact'
+  import { UsersPopup } from '@hcengineering/contact-resources'
   import { Class, Doc, Ref } from '@hcengineering/core'
   import { IntlString } from '@hcengineering/platform'
   import { getClient } from '@hcengineering/presentation'
-  import { UsersPopup } from '@hcengineering/contact-resources'
   import { Issue, IssueTemplate } from '@hcengineering/tracker'
   import { eventToHTMLElement, showPopup } from '@hcengineering/ui'
   import { AttributeModel } from '@hcengineering/view'
   import { getObjectPresenter } from '@hcengineering/view-resources'
   import tracker from '../../plugin'
 
-  export let value: Employee | null | undefined
+  export let value: Employee | Ref<Employee> | null | undefined
   export let object: Issue | IssueTemplate
   export let defaultClass: Ref<Class<Doc>> | undefined = undefined
   export let isEditable: boolean = true
@@ -37,9 +37,11 @@
 
   $: if (value || defaultClass) {
     if (value) {
-      getObjectPresenter(client, value._class, { key: '' }).then((p) => {
-        presenter = p
-      })
+      getObjectPresenter(client, typeof value === 'string' ? contact.class.Employee : value._class, { key: '' }).then(
+        (p) => {
+          presenter = p
+        }
+      )
     } else if (defaultClass) {
       getObjectPresenter(client, defaultClass, { key: '' }).then((p) => {
         presenter = p
@@ -68,7 +70,7 @@
       UsersPopup,
       {
         _class: contact.class.Employee,
-        selected: value?._id,
+        selected: typeof value === 'string' ? value : value?._id,
         docQuery: {
           active: true
         },
diff --git a/plugins/tracker-resources/src/components/issues/KanbanView.svelte b/plugins/tracker-resources/src/components/issues/KanbanView.svelte
index 9e6075071b..fc2fccb6a3 100644
--- a/plugins/tracker-resources/src/components/issues/KanbanView.svelte
+++ b/plugins/tracker-resources/src/components/issues/KanbanView.svelte
@@ -130,7 +130,6 @@
   }
 
   const lookup: Lookup<Issue> = {
-    assignee: contact.class.Employee,
     space: tracker.class.Project,
     status: tracker.class.IssueStatus,
     component: tracker.class.Component,
diff --git a/plugins/tracker-resources/src/components/issues/related/RelatedIssues.svelte b/plugins/tracker-resources/src/components/issues/related/RelatedIssues.svelte
index c6c18381a3..2a24b080b1 100644
--- a/plugins/tracker-resources/src/components/issues/related/RelatedIssues.svelte
+++ b/plugins/tracker-resources/src/components/issues/related/RelatedIssues.svelte
@@ -13,12 +13,11 @@
 // limitations under the License.
 -->
 <script lang="ts">
-  import contact from '@hcengineering/contact'
   import { Doc, DocumentQuery, Ref, SortingOrder } from '@hcengineering/core'
   import { createQuery } from '@hcengineering/presentation'
   import { Issue, Project } from '@hcengineering/tracker'
   import { Label, Spinner } from '@hcengineering/ui'
-  import { Viewlet, ViewOptions } from '@hcengineering/view'
+  import { ViewOptions, Viewlet } from '@hcengineering/view'
   import { createEventDispatcher } from 'svelte'
   import tracker from '../../../plugin'
   import AddIssueDuo from '../../icons/AddIssueDuo.svelte'
@@ -41,10 +40,7 @@
   let projects: Map<Ref<Project>, Project> | undefined
 
   $: subIssuesQuery.query(tracker.class.Issue, query, async (result) => (subIssues = result), {
-    sort: { rank: SortingOrder.Ascending },
-    lookup: {
-      assignee: contact.class.Employee
-    }
+    sort: { rank: SortingOrder.Ascending }
   })
 
   const projectsQuery = createQuery()
diff --git a/plugins/tracker-resources/src/types.ts b/plugins/tracker-resources/src/types.ts
index f8895b8352..e63fbe5a0b 100644
--- a/plugins/tracker-resources/src/types.ts
+++ b/plugins/tracker-resources/src/types.ts
@@ -98,7 +98,7 @@ export const defaultPriorities = [
 
 export const issuesGroupBySorting: Record<IssuesGrouping, SortingQuery<Issue>> = {
   [IssuesGrouping.Status]: { '$lookup.status.rank': SortingOrder.Ascending },
-  [IssuesGrouping.Assignee]: { '$lookup.assignee.name': SortingOrder.Ascending },
+  [IssuesGrouping.Assignee]: { assignee: SortingOrder.Ascending },
   [IssuesGrouping.Priority]: { priority: SortingOrder.Ascending },
   [IssuesGrouping.Component]: { '$lookup.component.label': SortingOrder.Ascending },
   [IssuesGrouping.Sprint]: { '$lookup.sprint.label': SortingOrder.Ascending },