I cannot tell what triggered it. But three of your projects are indexed and three are quarantined. Including the one that only has the csv file. Open a private window and click any download link. The message only appears when you really do click the link, and not earlier. Earlier the only indication is, that the games do not appear in search, if you search for LAGS.
It is weekend, so it might take a while for staff to look at this. If your account is not hacked (and it could be, without your knowlege. There is a thing called cookie theft), it should clear up.
There is an ongoing attack for years from scammers to upload fake games and stolen games with malware. I saw like 5 today. It stands to reason that Itch does something to fight those criminals. And that this something might give false positives. Those 5 were on older user accounts. That means, they did get hacked recently.