https://bugs.winehq.org/show_bug.cgi?id=52296
--- Comment #3 from Bernhard Übelacker bernhardu@mailbox.org --- Tried to find out a little more about it and hit that recursion_count variable in WINPROC_call_window. This variable increases fast until MAX_WINPROC_RECURSION is reached and gets always decreased and increased around that value. If MAX_WINPROC_RECURSION is set to 9 I could get past this issue in time and could connect.