https://bugs.winehq.org/show_bug.cgi?id=56231
--- Comment #9 from Rafał Mużyło galtgendo@o2.pl --- ...you know, funny thing, it just didn't connect at first reading.
I actually did experience a variant of this problem in ruby makers in bug 53910. There the windows are moved only *partially* offscreen, but it still freezes the updates till the window is moved fully back to primary display.