I ran more tests using builds from snapshot.debian.org: the last build I found with no rendering failure is 7.0~repack-2, the first build failing to render anything in the game window is 7.0~repack-3. Unless I missed something, there is only one commit between these two builds: https://salsa.debian.org/wine-team/wine/-/commit/e055001f272c3a3d7a0b28865f1de9fda13c2f10