Wallet height going backwards

I’m not sure what this means. But when I do chia show -s, I have full synced node and see current height
But when I do a wallet check, it is syncing, but the height is going down… Whats that mean? Version 1.7.1

log says something about atomic rollback to previous block. whats that mean?

Honestly ive never heard if it or seen it mentioned

Just let it do its thing.

I think that happens at start up and guessed it is going back to a checkpoint, probably to avoid being on the wrong branch