https://bugs.winehq.org/show_bug.cgi?id=52231
--- Comment #3 from Reinhold reinhold.hoffmann@hotmail.com --- The bug happens when tips for the button are delayedly displayed. The "delay" is done by timers (set, kill).
As the bug does not happen for Linux, I conclude that there is something wrong when various timers are frequently set and killed on a Mac.
In such a case the bug has a broader implication.