diff --git a/packages/editor/src/extensions/task-list/component.tsx b/packages/editor/src/extensions/task-list/component.tsx
index 42ff439ff..868793e2f 100644
--- a/packages/editor/src/extensions/task-list/component.tsx
+++ b/packages/editor/src/extensions/task-list/component.tsx
@@ -39,7 +39,9 @@ export function TaskListComponent(
   const checked = stats.total > 0 && stats.total === stats.checked;
 
   const isNested = useMemo(() => {
-    if (!pos || editor.state.doc.nodeSize < pos) return false;
+    if (!pos || !(pos >= 0 && pos <= editor.state.doc.content.size))
+      return false;
+
     return editor.state.doc.resolve(pos).parent.type.name === TaskItem.name;
   }, [editor.state.doc, pos]);