https://bugs.winehq.org/show_bug.cgi?id=50271
--- Comment #10 from Zebediah Figura z.figura12@gmail.com --- It could potentially be a windowing problem, specific to xfce. For reference, I tested with KDE.
Testing with a virtual desktop might potentially help to confirm this.
If you can attach a log with WINEDEBUG=+pid,+loaddll,+win,+event,+msg,+message,+seh, that might also help to confirm this.