https://bugs.winehq.org/show_bug.cgi?id=38845
--- Comment #9 from The Source thesource@mail.ru --- (In reply to Jonas Platte from comment #8)
I have the same problem, although the terminal isn't flooded (I get the same messages, but only once, wouldn't call that flooding).
Move the mouse over the window to make wine repeat the messages (or make window to try to repaint in any other way).