https://bugs.winehq.org/show_bug.cgi?id=12007
--- Comment #17 from Sebastian Lackner sebastian@fds-team.de --- (In reply to Sergey Isakov from comment #16)
(In reply to Sebastian Lackner from comment #13)
Patch added to the staging tree: https://github.com/wine-compholio/wine-staging/blob/master/patches/user32- Mouse_Message_Hwnd/0001-user32-Try-harder-to-find-a-target-for-mouse-message. patch
It's a pity this patch is wrong in my case. It leads to another bug: when a game crashes the a dialog window appeared "Program Error" with two buttons "Show details" and "Close". These button are no more clickable because of this patch. Reverting it resolves the issue.
If you think the patch causes regressions, please open a new bug report for it (in the Wine Staging product) including details how to reproduce it.