diff --git a/addons/web_editor/static/src/js/editor/odoo-editor/src/OdooEditor.js b/addons/web_editor/static/src/js/editor/odoo-editor/src/OdooEditor.js
index 51569561a7a..e80806b482f 100644
--- a/addons/web_editor/static/src/js/editor/odoo-editor/src/OdooEditor.js
+++ b/addons/web_editor/static/src/js/editor/odoo-editor/src/OdooEditor.js
@@ -73,6 +73,7 @@ import {
     isVoidElement,
     cleanZWS,
     isZWS,
+    getDeepestPosition,
 } from './utils/utils.js';
 import { editorCommands } from './commands/commands.js';
 import { Powerbox } from './powerbox/Powerbox.js';
@@ -1547,26 +1548,34 @@ export class OdooEditor extends EventTarget {
     _multiselectionDisplayClient({ selection, color, clientId, clientAvatarUrl = '', clientName = this.options._t('Anonymous') }) {
         let clientRects;
 
-        const anchorNode = this.idFind(selection.anchorNodeOid);
-        const focusNode = this.idFind(selection.focusNodeOid);
+        let anchorNode = this.idFind(selection.anchorNodeOid);
+        let focusNode = this.idFind(selection.focusNodeOid);
+        let anchorOffset = selection.anchorOffset;
+        let focusOffset = selection.focusOffset;
         if (!anchorNode || !focusNode) {
-            return;
+            anchorNode = this.editable.children[0];
+            focusNode = this.editable.children[0];
+            anchorOffset = 0;
+            focusOffset = 0;
         }
 
+        [anchorNode, anchorOffset] = getDeepestPosition(anchorNode, anchorOffset);
+        [focusNode, focusOffset] = getDeepestPosition(focusNode, focusOffset);
+
         const direction = getCursorDirection(
             anchorNode,
-            selection.anchorOffset,
+            anchorOffset,
             focusNode,
-            selection.focusOffset,
+            focusOffset,
         );
         const range = new Range();
         try {
             if (direction === DIRECTIONS.RIGHT) {
-                range.setStart(anchorNode, selection.anchorOffset);
-                range.setEnd(focusNode, selection.focusOffset);
+                range.setStart(anchorNode, anchorOffset);
+                range.setEnd(focusNode, focusOffset);
             } else {
-                range.setStart(focusNode, selection.focusOffset);
-                range.setEnd(anchorNode, selection.anchorOffset);
+                range.setStart(focusNode, focusOffset);
+                range.setEnd(anchorNode, anchorOffset);
             }
 
             clientRects = Array.from(range.getClientRects());
@@ -3693,13 +3702,17 @@ export class OdooEditor extends EventTarget {
 
     getCurrentCollaborativeSelection() {
         const selection = this._latestComputedSelection || this._computeHistorySelection();
-        if (!selection) return;
-        return Object.assign({
-            selection: serializeSelection(selection),
+        return {
+            selection: selection ? serializeSelection(selection) : {
+                anchorNodeOid: undefined,
+                anchorOffset: undefined,
+                focusNodeOid: undefined,
+                focusOffset: undefined,
+            },
             color: this._collabSelectionColor,
             clientId: this._collabClientId,
             clientAvatarUrl: this._collabClientAvatarUrl,
-        });
+        };
     }
 
     clean() {