https://bugs.winehq.org/show_bug.cgi?id=57549
--- Comment #6 from jenngra505@roadrunner.com --- (In reply to 253 from comment #3)
Also happens to me in FL Studio 20, Fedora KDE+NVIDIA, Wine 10.0rc2. Menus open properly initially then this randomly begins happening (most often after opening and closing the open/save file dialog)
I would recommend making a separate issue for your issue in FL Studio so I can add it as a dependency.