https://bugs.winehq.org/show_bug.cgi?id=6682
--- Comment #53 from Rosanne DiMesio dimesio@earthlink.net --- (In reply to Artem S. Tashkinov from comment #52)
Have you moved the about window or overlaid it with something?
Yes. I dragged it all around the screen, dragged other windows over it, and since alt-tabbing was mentioned in an early comment, tested that too. The picture stayed visible no matter what.
Also your composite window manager might have interfered - I don't use one.
I just tested it in IceWM, with no difference.
I also tested it in 3.0-rc5 in both openSUSE 13.1 and 42.1, because a year ago I was able to reproduce the problem (comment 45). It was fixed in current Wine in both older openSUSE versions, too. So on my system, the problem really did exist a year ago and was fixed some time in the interim. I have no idea why it's still not working for you.