https://bugs.winehq.org/show_bug.cgi?id=38064
--- Comment #9 from Stefan Dösinger stefan@codeweavers.com --- I guess there are two problems here: One where the application gets stuck because Marco doesn't minimize it (solved by my patch), and another one where the application thinks it loses focus even though it has not. The focus loss (and thus minimization to the desktop) doesn't happen inside a virtual desktop and with KDE, so I guess this is another case where Wine's interaction with Marco goes wrong. I'll try to debug it to find out if it is our bug or Marco's, but I can't give you an ETA at this point.
(Also I have to do more pushing to get the fix for the other issue upstream. It has been accepted into Muffin already, so that's 1 out of 3 Metacity forks)