https://forums.ankiweb.net/t/statistics-messed-up-after-fsrs-reschedule/54622 Caused by syncing the revlogs in a normal sync to a client that doesn't understand them yet - they end up using the default for RevlogReviewKind instead, which is 0.
- notes with wrong field count are now recovered instead of being deleted - notes with missing note types are now recovered - notes with missing cards are now recovered - recover_missing_deck() still needs implementing - checks required
