I have had a search and can’t find anything on this.
If you are in your condo (or just have admin rank), when you are playing the piano you can sometimes break the jetpack. If you hit v while in the piano (the noclip button) and get off, you can’t use the jetpack. The only way to fix it is to hit v to turn it on and then again to turn it off. (When it’s broken, you can only jump. The jetpack doesnt do anything, probably because it thinks you are in noclip mode.)