https://bugs.winehq.org/show_bug.cgi?id=44796
--- Comment #15 from Józef Kucia joseph.kucia@gmail.com --- It's a race condition when the application is setting palette entries. I submitted patches to wine-devel:
https://www.winehq.org/pipermail/wine-devel/2019-January/137509.html https://www.winehq.org/pipermail/wine-devel/2019-January/137510.html