Seesaw falling

Hi! I have a problem: we are using a seesaw flywheel bot, and everything seems to be working well until two days ago… when the seeaw just falls off, like just falls off, and the weird thing is this ha never happened, like we didn’t change anything and it just fell off (by falling off, the holders just push it away and it disconnects from them). WSe tried everything, double nails, a beam on the holders attached to double nails, more holder, less holders etc… (everything else on the bot works fine, like its not falling apart and its very stable. ) Please help, this never really happens and it just fell all of a sudden.

Could you send a picture of what you are talking about? It will greatly help us understand better