https://bugs.winehq.org/show_bug.cgi?id=57175
--- Comment #41 from Jinoh Kang jinoh.kang.kr@gmail.com --- (In reply to wine_bugzilla from comment #40)
Finally, note there is one new problem; from the single full-screen app I use, I can now alt-tab to the Linux desktop exactly *once* before the display of the app goes black, i.e. the screen display is now simply a black screen, and so the app must be killed from the Linux command line and then restarted.
It used to be I could alt-tab quite a bit, maybe ten times, but in the end textures would not load, and then I would need to quit (which I could do in the normal way, and restart.)
This seems to be a separate issue. Can you file a bug for that, ideally with bisected regression?