- Open dialog with some elements, to have scroll in the dialog
- Open Autocomplete items
- Scroll down dialog scroll and you will see the issue
- Open dialog with Autocomplete
- Open Autocomplete items (options)
- Mouse down on 'Title to move' and move dialog and see the issue
Issue link: angular/components#30254
Fix in version 20.0.0-next.2: https://github.com/angular/components/commit/097f49d90f5fe079a0399fd499202a8bdd1542cf

