http://bugs.winehq.org/show_bug.cgi?id=58688
--- Comment #8 from Stian Low wineryyyyy@gmail.com --- (In reply to Stian Low from comment #7)
Here's your very vanilla regression:
ed9f31120b68e7d684c1544c05d94c38b25cb759 is the first bad commit
NtSetEventBoostPriority changes seem to be the main issue based on backtrace.