Allay's wont stop dancing even after the song is done playing they only stop when you take the music disk out.

Steps to recreate:

1. get an allay on a lead next to the juke box
2. start playing the otherside music disk 
3. then wait for the song to end
4. then the music will stop and they will keep dancing next to it
5. then take the music disk out of the juke box and they will stop dancing