https://bugs.winehq.org/show_bug.cgi?id=37876
--- Comment #20 from Dmitry Timoshkov dmitry@baikal.ru --- (In reply to Ken Thomases from comment #18)
I noticed the component being set to winex11.drv. Too bad we can't specify more than one component, since the Mac driver (winemac.drv) has similar logic and would need a similar fix.
I'd say that it's a user32 bug, the driver is just a user32 backend in this case.