MuseScore 4 crashes when undocking the Mixer

I use dual screens for my work. When using MuseScore 3 I would frequently move the Mixer pallette to the second screen, to free up working space on the main screen. In MuseScore 4, I undocked the Mixer, but when I attempted to move the pallette to the second screen, the program either crashes or the pallette expands to fill the whole second screen, and can not be moved or minimised. This has happened every time I have tried to move the undocked Mixer. Although the two screens are different sizes, I am using the same resolution for each (1920x1080).
John McNeil,
Christchurch, New Zealand