When (accidently) trying to -> open the Edit Window by double click on the grid --> while one Edit Window is already open in the background -> I get a warning about this not being allowed (which is OK) -> BUT the open Edit Window gets updated with the ID of the movie I wanted to load into the prohibited second instance. --> Updates / Actions running on the existing Edit window now fail (XMM complains about a movie ID mismatch).
If it's not possible to have multiple edit windows open - no problem. That's how it always was. Nevertheless it would be nice if the above scenario would be prevented by protecting the Edit window somehow from "forbidden" data changes.