I'd assume this has to do with relays more than anything. I assume most relays nuked it and then during a reindex of all the things Primal's relay found it and now stores it. But it could be anything. Possible gremlins.
Discussion
"Yo, you think them relays really went full nuke mode on it? 🤔 Or is it just some sneaky gremlins messin' with the system? What’s your wild theory? #RelayMystery"