diff --git a/frontend/app/components/Assist/components/AssistTabs/AssistTabs.tsx b/frontend/app/components/Assist/components/AssistTabs/AssistTabs.tsx
index 47f93eaa8..7ac544de2 100644
--- a/frontend/app/components/Assist/components/AssistTabs/AssistTabs.tsx
+++ b/frontend/app/components/Assist/components/AssistTabs/AssistTabs.tsx
@@ -1,37 +1,29 @@
 import { useModal } from 'App/components/Modal';
-import React, { useState } from 'react';
+import React from 'react';
 import SessionList from '../SessionList';
-import stl from './assistTabs.module.css'
+import stl from './assistTabs.module.css';
 
 interface Props {
-  userId: any,
-  userNumericHash: any,
+  userId: any;
 }
 
 const AssistTabs = (props: Props) => {
-  const [showMenu, setShowMenu] = useState(false)
   const { showModal } = useModal();
 
   return (
     <div className="relative mr-4">
       <div className="flex items-center">
         {props.userId && (
-          <>
-            <div
-              className={stl.btnLink}
-              onClick={() => showModal(<SessionList userId={props.userId} />, { right: true, width: 700 })}
-            >
-              Active Sessions
-            </div>
-          </>
+          <div
+            className={stl.btnLink}
+            onClick={() =>
+              showModal(<SessionList userId={props.userId} />, { right: true, width: 700 })
+            }
+          >
+            Active Sessions
+          </div>
         )}
       </div>
-      {/* <SlideModal
-        title={ <div>{props.userId}'s <span className="color-gray-medium">Live Sessions</span> </div> }
-        isDisplayed={ showMenu }
-        content={ showMenu && <SessionList /> }
-        onClose={ () => setShowMenu(false) }
-      /> */}
     </div>
   );
 };
diff --git a/frontend/app/components/Assist/components/SessionList/SessionList.tsx b/frontend/app/components/Assist/components/SessionList/SessionList.tsx
index a919fcf09..4f297d2c5 100644
--- a/frontend/app/components/Assist/components/SessionList/SessionList.tsx
+++ b/frontend/app/components/Assist/components/SessionList/SessionList.tsx
@@ -46,7 +46,7 @@ function SessionList(props: Props) {
                 >
                     <div className="p-4">
                         {props.list.map((session: any) => (
-                            <div className="mb-6">
+                            <div className="mb-6" key={session.sessionId}>
                                 {session.pageTitle && session.pageTitle !== '' && (
                                     <div className="flex items-center mb-2">
                                         <Label size="small" className="p-1">
@@ -55,7 +55,7 @@ function SessionList(props: Props) {
                                         <span className="ml-2 font-medium">{session.pageTitle}</span>
                                     </div>
                                 )}
-                                <SessionItem compact={true} onClick={() => hideModal()} key={session.sessionId} session={session} />
+                                <SessionItem compact={true} onClick={hideModal} session={session} />
                             </div>
                         ))}
                     </div>
diff --git a/frontend/app/components/Session/LivePlayer.tsx b/frontend/app/components/Session/LivePlayer.tsx
index 060ff1b8f..b73cf4ea9 100644
--- a/frontend/app/components/Session/LivePlayer.tsx
+++ b/frontend/app/components/Session/LivePlayer.tsx
@@ -71,12 +71,13 @@ function LivePlayer({
 
     return () => {
       if (!location.pathname.includes('multiview') || !location.pathname.includes(usedSession.sessionId)) {
+        console.debug('unmount', usedSession.sessionId)
         playerInst?.clean?.();
         // @ts-ignore default empty
         setContextValue(defaultContextValue)
       }
     }
-  }, [location.pathname]);
+  }, [location.pathname, usedSession.sessionId]);
 
   // LAYOUT (TODO: local layout state - useContext or something..)
   useEffect(() => {
diff --git a/frontend/app/components/Session/Player/LivePlayer/LivePlayerBlockHeader.tsx b/frontend/app/components/Session/Player/LivePlayer/LivePlayerBlockHeader.tsx
index 1fd3b503e..2394e81ca 100644
--- a/frontend/app/components/Session/Player/LivePlayer/LivePlayerBlockHeader.tsx
+++ b/frontend/app/components/Session/Player/LivePlayer/LivePlayerBlockHeader.tsx
@@ -46,7 +46,7 @@ function LivePlayerBlockHeader(props: any) {
     history.push(withSiteId(ASSIST_ROUTE, siteId));
   };
 
-  const { userId, userNumericHash, metadata, isCallActive, agentIds } = session;
+  const { userId, metadata, isCallActive, agentIds } = session;
   let _metaList = Object.keys(metadata)
     .filter((i) => metaList.includes(i))
     .map((key) => {
@@ -87,7 +87,7 @@ function LivePlayerBlockHeader(props: any) {
           </div>
         )}
         <UserCard className="" width={width} height={height} />
-        <AssistTabs userId={userId} userNumericHash={userNumericHash} />
+        <AssistTabs userId={userId} />
 
         <div className={cn('ml-auto flex items-center h-full', { hidden: closedLive })}>
           {_metaList.length > 0 && (
diff --git a/frontend/app/components/shared/SessionItem/SessionItem.tsx b/frontend/app/components/shared/SessionItem/SessionItem.tsx
index 1c9d756a3..3642c2981 100644
--- a/frontend/app/components/shared/SessionItem/SessionItem.tsx
+++ b/frontend/app/components/shared/SessionItem/SessionItem.tsx
@@ -55,6 +55,7 @@ interface Props {
   compact?: boolean;
   isDisabled?: boolean;
   isAdd?: boolean;
+  ignoreAssist?: boolean;
 }
 
 function SessionItem(props: RouteComponentProps & Props) {
@@ -70,6 +71,7 @@ function SessionItem(props: RouteComponentProps & Props) {
     lastPlayedSessionId,
     onClick = null,
     compact = false,
+    ignoreAssist = false,
   } = props;
 
   const {
@@ -99,9 +101,10 @@ function SessionItem(props: RouteComponentProps & Props) {
   const hasUserId = userId || userAnonymousId;
   const isSessions = isRoute(SESSIONS_ROUTE, location.pathname);
   const isAssist =
-    isRoute(ASSIST_ROUTE, location.pathname) ||
-    isRoute(ASSIST_LIVE_SESSION, location.pathname) ||
-    location.pathname.includes('multiview');
+    !ignoreAssist &&
+    (isRoute(ASSIST_ROUTE, location.pathname) ||
+      isRoute(ASSIST_LIVE_SESSION, location.pathname) ||
+      location.pathname.includes('multiview'));
   const isLastPlayed = lastPlayedSessionId === sessionId;
 
   const _metaList = Object.keys(metadata)
diff --git a/frontend/app/components/shared/UserSessionsModal/UserSessionsModal.tsx b/frontend/app/components/shared/UserSessionsModal/UserSessionsModal.tsx
index 0c8b1b480..8a76e8ed9 100644
--- a/frontend/app/components/shared/UserSessionsModal/UserSessionsModal.tsx
+++ b/frontend/app/components/shared/UserSessionsModal/UserSessionsModal.tsx
@@ -70,7 +70,7 @@ function UserSessionsModal(props: Props) {
                     <Loader loading={loading}>
                         {data.sessions.map((session: any) => (
                             <div className="border-b last:border-none" key={session.sessionId}>
-                                <SessionItem key={session.sessionId} session={session} compact={true} onClick={hideModal} />
+                                <SessionItem key={session.sessionId} session={session} compact={true} onClick={hideModal} ignoreAssist={true} />
                             </div>
                         ))}
                     </Loader>
diff --git a/frontend/app/player/web/WebLivePlayer.ts b/frontend/app/player/web/WebLivePlayer.ts
index 6bcb20fcb..8753190b5 100644
--- a/frontend/app/player/web/WebLivePlayer.ts
+++ b/frontend/app/player/web/WebLivePlayer.ts
@@ -90,7 +90,7 @@ export default class WebLivePlayer extends WebPlayer {
   clean = () => {
     this.incomingMessages.length = 0
     this.assistManager.clean()
-    this.screen.clean()
+    this.screen?.clean?.()
     // @ts-ignore
     this.screen = undefined;
     super.clean()
diff --git a/frontend/app/player/web/managers/DOM/DOMManager.ts b/frontend/app/player/web/managers/DOM/DOMManager.ts
index f6291fa0a..85d21e85d 100644
--- a/frontend/app/player/web/managers/DOM/DOMManager.ts
+++ b/frontend/app/player/web/managers/DOM/DOMManager.ts
@@ -38,7 +38,6 @@ export default class DOMManager extends ListWalker<Message> {
   private olStyleSheets: Map<number, OnloadStyleSheet> = new Map()
   /** @depreacted since tracker 4.0.2 Mapping by nodeID */
   private olStyleSheetsDeprecated: Map<number, OnloadStyleSheet> = new Map()
-  private stringDict: Record<number,string> = {}
 
   private upperBodyId: number = -1;
   private nodeScrollManagers: Map<number, ListWalker<SetNodeScroll>> = new Map()
@@ -49,6 +48,7 @@ export default class DOMManager extends ListWalker<Message> {
   constructor(
     private readonly screen: Screen,
     private readonly isMobile: boolean,
+    private stringDict: Record<number,string>,
     public readonly time: number,
     setCssLoading: ConstructorParameters<typeof StylesManager>[1],
   ) {
@@ -57,6 +57,10 @@ export default class DOMManager extends ListWalker<Message> {
     this.stylesManager = new StylesManager(screen, setCssLoading)
   }
 
+  setStringDict(stringDict: Record<number,string>) {
+    this.stringDict = stringDict
+  }
+
   append(m: Message): void {
     if (m.tp === MType.SetNodeScroll) {
       let scrollManager = this.nodeScrollManagers.get(m.id)
@@ -192,7 +196,6 @@ export default class DOMManager extends ListWalker<Message> {
         // Maybetodo: start Document as 0-node in tracker
         this.vTexts.clear()
         this.stylesManager.reset()
-        this.stringDict = {}
         return
       }
       case MType.CreateTextNode: {
@@ -227,12 +230,9 @@ export default class DOMManager extends ListWalker<Message> {
       case MType.SetNodeAttribute:
         this.setNodeAttribute(msg)
         return
-      case MType.StringDict:
-        this.stringDict[msg.key] = msg.value
-        return
       case MType.SetNodeAttributeDict:
-        this.stringDict[msg.nameKey] === undefined && logger.error("No dictionary key for msg 'name': ", msg)
-        this.stringDict[msg.valueKey] === undefined && logger.error("No dictionary key for msg 'value': ", msg)
+        this.stringDict[msg.nameKey] === undefined && logger.error("No dictionary key for msg 'name': ", msg, this.stringDict)
+        this.stringDict[msg.valueKey] === undefined && logger.error("No dictionary key for msg 'value': ", msg, this.stringDict)
         if (this.stringDict[msg.nameKey] === undefined || this.stringDict[msg.valueKey] === undefined ) { return }
         this.setNodeAttribute({
           id: msg.id,
diff --git a/frontend/app/player/web/managers/DOM/safeCSSRules.ts b/frontend/app/player/web/managers/DOM/safeCSSRules.ts
index a65c0cf6c..ba62ad0db 100644
--- a/frontend/app/player/web/managers/DOM/safeCSSRules.ts
+++ b/frontend/app/player/web/managers/DOM/safeCSSRules.ts
@@ -1,14 +1,15 @@
 import logger from 'App/logger';
 
-export type { PostponedStyleSheet } from './VirtualDOM'
-
-export function insertRule(sheet: CSSStyleSheet | PostponedStyleSheet, msg: { rule: string, index: number }) {
+export function insertRule(
+  sheet: { insertRule: (rule: string, index: number) => void },
+  msg: { rule: string, index: number }
+) {
   try {
     sheet.insertRule(msg.rule, msg.index)
   } catch (e) {
     logger.warn(e, msg)
     try {
-      sheet.insertRule(msg.rule, 0)
+      sheet.insertRule(msg.rule, 0) // TODO: index renumeration in case of subsequent rule deletion
       logger.warn("Inserting rule into 0-index", e, msg)
     } catch (e) {
       logger.warn("Cannot insert rule.", e, msg)
@@ -16,7 +17,10 @@ export function insertRule(sheet: CSSStyleSheet | PostponedStyleSheet, msg: { ru
   }
 }
 
-export function deleteRule(sheet: CSSStyleSheet | PostponedStyleSheet, msg: { index: number }) {
+export function deleteRule(
+  sheet: { deleteRule: (index: number) => void },
+  msg: { index: number }
+) {
   try {
     sheet.deleteRule(msg.index)
   } catch (e) {
diff --git a/frontend/app/player/web/managers/PagesManager.ts b/frontend/app/player/web/managers/PagesManager.ts
index dbc64bb72..1b3fd9bdf 100644
--- a/frontend/app/player/web/managers/PagesManager.ts
+++ b/frontend/app/player/web/managers/PagesManager.ts
@@ -1,13 +1,21 @@
-import type Screen from '../Screen/Screen';
-import type { Message } from '../messages';
+import logger from 'App/logger';
 
-import { MType } from '../messages';
+import type Screen from '../Screen/Screen';
+import type { Message, StringDict } from '../messages';
+
+import { MType} from '../messages';
 import ListWalker from '../../common/ListWalker';
 import DOMManager from './DOM/DOMManager'; 
 
 
 export default class PagesManager extends ListWalker<DOMManager> {
 	private currentPage: DOMManager | null = null
+	/**
+	 * String Dictionary in tracker may be desync with CreateDocument (why???) 
+	 * e.g. some StringDictionary and other messages before any 'CreateDocument' one
+	 * TODO: understand why and fix
+	 */
+	private currentStringDict: Record<number, string> = {}
 
 	constructor(
 		private screen: Screen,
@@ -19,11 +27,19 @@ export default class PagesManager extends ListWalker<DOMManager> {
 		Assumed that messages added in a correct time sequence.
 	*/
 	appendMessage(m: Message): void {
+		if (m.tp === MType.StringDict) {
+			if (this.currentStringDict[m.key] !== undefined) {
+				this.currentStringDict = {} /* refresh stringDict */
+				this.last?.setStringDict(this.currentStringDict)
+			}
+			this.currentStringDict[m.key] = m.value
+			return
+		}
 		if (m.tp === MType.CreateDocument) {
-			super.append(new DOMManager(this.screen, this.isMobile, m.time, this.setCssLoading))
+			super.append(new DOMManager(this.screen, this.isMobile, this.currentStringDict, m.time, this.setCssLoading))
 		}
 		if (this.last === null) {
-			// Log wrong
+			logger.warn("DOMMessage before any document created, skipping:", m)
 			return;
 		}
 		this.last.append(m)