https://bugs.winehq.org/show_bug.cgi?id=43153
--- Comment #18 from Michael B toxatec@web.de --- I can't reproduce this issue anymore as I did in comment 13.
I'm now using wine-5.13 from the slackware64 package on sourceforge, slackware64 live, nouveau drivers, G92 chip, Mesa 19.0.6 .
I don't think this proves that the issue is gone, considering that Richard Thier's findings in comment 14 didn't confirm my observations about LIBGL_ALWAYS_SOFTWARE=1 and toggle-to-desktop to work around the issue.