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 4ee545cf2e6..33a9ac919bb 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
@@ -1686,7 +1686,7 @@ export class OdooEditor extends EventTarget {
      */
     _computeHistorySelection() {
         const sel = this.document.getSelection();
-        if (!sel.anchorNode) {
+        if (!(sel && sel.anchorNode)) {
             return this._latestComputedSelection;
         }
         this._latestComputedSelection = {
diff --git a/addons/web_editor/static/src/js/editor/odoo-editor/src/utils/sanitize.js b/addons/web_editor/static/src/js/editor/odoo-editor/src/utils/sanitize.js
index 1904f8c3ff3..71550aecb97 100644
--- a/addons/web_editor/static/src/js/editor/odoo-editor/src/utils/sanitize.js
+++ b/addons/web_editor/static/src/js/editor/odoo-editor/src/utils/sanitize.js
@@ -123,7 +123,8 @@ class Sanitize {
                 node = nodeP;
             }
 
-            const anchor = this.root.ownerDocument.getSelection().anchorNode;
+            const selection = this.root.ownerDocument.getSelection();
+            const anchor = selection && selection.anchorNode;
             const anchorEl = anchor && closestElement(anchor);
             // Remove zero-width spaces added by `fillEmpty` when there is
             // content and the selection is not next to it.