LrC edits completely disappearing randomly

Last night I was working on a set of photos and using the AI Denoise relatively frequently. Not sure if it is related, but I've lost at least 4 full edits in this set already in 1-2 hours of working on this catalog. 

Is it possible the catalog is corrupt (I created a new catalog for this import, so that any existing issues with another catalog wouldn't affect it), or is it because of using AI Denoise, or would this have anything to do with the photos living on an external drive vs the local hard drive? I cannot for the life of me figure out what the problem is, but definitely cannot keep spending time on edits that disappear spontaneously. Never had this issue with Lightroom Classic before but I have seen it in Capture One once before. 

Quite simply put, a photo will suddenly revert to its original state without any of its edits and I believe I have not touched or done anything. There is no "undo" option. The edits are just lost and I've rebuilt them each time this happened.