diff --git a/packages/stage/src/StageMask.ts b/packages/stage/src/StageMask.ts
index 669501c5b..fd9623c28 100644
--- a/packages/stage/src/StageMask.ts
+++ b/packages/stage/src/StageMask.ts
@@ -116,7 +116,7 @@ export default class StageMask extends Rule {
     if (!page) return;
 
     this.page = page;
-    this.pageScrollParent = getScrollParent(page);
+    this.pageScrollParent = getScrollParent(page) || this.core.renderer.contentWindow?.document.documentElement || null;
     this.pageResizeObserver?.disconnect();
 
     if (typeof ResizeObserver !== 'undefined') {