Same here. Very frustrating. I selected AI clean-up and it erased my entire list of To Dos only leaving a few useless bullets. I restored the older version several times and it repeats to delete everything. I think that once you select AI clean-up it is on and can't be shut off so keeps repeating. My solution is to start a new Notebook and copy the restored backup info into that, and delete the corrupted one. Seems to be working.