Sorry for the late response! I think I had a hard restart due to a power outage. If cutting power can cause sync errors, I guess that'd be why. It was a scheduled check as well. I have one set for the 1st of every month.
Thank you for the non-correcting sync setting recommendation. I had that enabled as I thought it'd be the safest option. I'll be sure to turn that off. Should I keep "Cumulative parity check" disabled too?