http://bugs.winehq.org/show_bug.cgi?id=58646
--- Comment #2 from ihatemylife0025@gmail.com --- Yes (In reply to Louis Lenders from comment #1)
Does it change anything if you run it in a virtual desktop (under winecfg-->Graphics tab)?
For me it looks that if i do this, the issue doesn't appear. Could you confirm that?
If you look carefully when you run it in a virtual desktop the black rectangle is behind the main window. It no longer obscures the video preview but you can't resize stickers or clips because that black rectangle seems to be the resize/move overlay.