Indeed, it always appears to be corrupted after a scan. I think it’s because of how PMS rebuilds the indexes (or doesn’t) itself after scans. It seems to do it lazily, not in realtime. It’s unfortunate as it leads to these kinds of misunderstandings.
The net result is that the full-text search functionality may not have the most up-to-date information. But the database is not corrupted in any way even if reported as such (for the FTS tables).