Trying to sign this, I got a 429 "too many requests" when clicking on confirm, and something about 20 per 1 hour. Did I sign, or didn't I? Reloading the page te

Trying to sign this, I got a 429 "too many requests" when clicking on confirm, and something about 20 per 1 hour. Did I sign, or didn't I? Reloading the page tells me there's no pending confirmation ID.