https://bugs.winehq.org/show_bug.cgi?id=37398
--- Comment #9 from Stefan Dösinger stefan@codeweavers.com --- Hmm, it sounds like the game wants palettized blits to just pass data from src to dst surface without doing any palette lookup or other conversions. But I think this is what the current code should already do.
Can you check what the format of the destination surface is in the affected blits?