https://bugs.winehq.org/show_bug.cgi?id=53940
--- Comment #20 from Louis Lenders xerox.xerox2000x@gmail.com --- (In reply to William Tracy from comment #18)
(wine Vara.exe TCPIP 127.0.0.1 8300)
generates a good VARA window.
Well then i`m a bit out of ideas really; could be maybe repainting/focus issue but that is all a shot in the dark Guess someone really needs to debug this deeply then.
Maybe one thing you might try is try maximize /minimize or resize the window, or run the app in a virtual desktop (see winecfg under graphics tab)