Can files become corrupted?

Ok so this isn’t the first time something like this has happened. I’ve been working on a sliced loop, placed on random trigs. Nothing was changed, a few scenes were added and I was having fun using the chopped loop as the basis of a new track.

I was on another track, where I switched to chromatic mode to play an external synth, then upon changing back to the previous track it’s all out of sync. Here’s the thing though, I deleted all the trigs and just tried to play the loop on its own and it won’t play in sync, even when I open this file on another flex machine it won’t sync, auto is ‘on’ in the playback menu.

Anyone any idea what is happening here?