Minimizing MuseScore window doesn't work
Minimizing the MuseScore Window doesnt work. When I click on the minimizing button the window disappear for a short time and then it appears again.
For comparing minimizing other applications works well
OS: Ubuntu 18.04.3 LTS, Arch.: x86_64, MuseScore version (64-bit): 3.3.4., revision: 7684abe