https://bugs.winehq.org/show_bug.cgi?id=57808
--- Comment #6 from Forest forestix@nom.one --- I was able to test a build with the user32-rawinput-mouse patchset excluded, and the bug was gone. Since I don't see any other related patches introduced in wine-staging 9.4, I conclude that aa8b27c396f926212689d18da91778f5f8821c6d is indeed the cause of the regression.