Hi, thanks for the quick reply.
I was listening to music last night. I paused it, then put the computer into hibernation. When I turned the computer on this morning, these dialogs were present, without me having interacted with MusicBee at all (still paused). It always behaves exactly like this. The only fix is either to click through all the dialogs, or to kill the process.
I've also had it happen when I just left MusicBee running in the background after it finished playing whatever I listened to (i.e. playback stopped completely, just items remaining in the list) and later put the computer into hibernation.