Details

According to https://github.com/flutter/flutter/blob/0ff68b8c610d54dd88585d0f97531208988f80b3/packages/flutter/lib/src/cupertino/context_menu.dart#L560C1-L583C1

_lastOverlayEntry is only removed when animation is dismissed or completed.

What if the overlayEntry is inserted, and then the CupertinoContextMenu is disposed and removed from widgets tree? So the entry will never be removed.

Temporary solution is add _lastOverlayEntry?.remove() to

https://github.com/flutter/flutter/blob/0ff68b8c610d54dd88585d0f97531208988f80b3/packages/flutter/lib/src/cupertino/context_menu.dart#L683C1-L687C4

But this is not enough, because there will be no animation, and it will be abrupt for it to suddenly disappear.

Steps to reproduce

1. Add a CupertinoContextMenu to any visible widget.
2. Press it to insert the overlayEntry (the _DecoyChild) , while remove the CupertinoContextMenu from the widgets tree.
3. The entry never dismissed.