As someone that uses multiple monitors, here's a bug i encountered when tagging music on MusicBee.
When right clicking the cover in the tag edit menu, the right click menu sticks to the monitor where MusicBee running. Other right click menu's in the the tag edit menu doesn't gave this issue.
Here's a screenshot of what i'm talking about:
http://i.imgur.com/bnTDC2r.pngHere's a GIF of the bug:
http://i.imgur.com/oFxml36.gifv