Game Is Spamming Autonomous Dance Actions

yesterday when i played, a npc came over and started the music at my sims home. Emidiately every sim who was in the same room as the music got automatically pop ups-actions that they were going to dance. And the pop ups kept coming, multible, like hundereds taking up the whole queue and more. I couldn´t order my sims to do anything else because of these actions talking up, you know when you have too many things to do in the queue. 
As soon as one other of my sims could turn it off from another room, the pop-up actions stopped. Weirdest **bleep** ever.