Apparently a f2fs corruption issue was already mentioned by sobrus as early as in June, which might be related, or that was exactly this same issue which you reported on bugzilla. The kernel version mentioned in that post was 5.18.3, and he had no issues with up to 5.18.1.
Looks like f2fs has been broken upstream for quite a while, but given these are the only relevant posts I could find on this forum, this issue, though serious, may not have affected many people.