Not sure if this is a bug or a Windows failing.
If I have MB open on monitor2, and open a sub-panel (preferences, tag editor, etc) then these get opened on monitor1.
If I drag these panels over to monitor2, the next time I use MB on monitor1 I have to drag them all back to monitor1.
Can't MB can't tell which monitor it's open on and open the sub-panels to match?
I have some programs that behave the same as MB (MP3tag) but I also have others that can follow which monitor they are open on.