Gives you something to go on at least...

This is odd though since you didn't say it was a data loss / SCB closure, so its either the bug I mentioned before or something else altogether. You should take this to the discussion boards on the LND github to be safe.

My guess is they'll direct you here after further diagnosis: https://github.com/lightninglabs/chantools/blob/master/doc/zombierecovery.md