cybre.space users: this appears to be due to the cybre.space web server taking too long to respond and returning a 504 / timeout error. if you see this happen, it might mean the server is just processing slowly and will eventually submit the post! (looking into why it's taking so long, but this should help you avoid accidentally submitting duplicates in the meantime)
and then suddenly its fine?? didnt get a response to my support ticket but i'll take it
@chr did the issues coincide with a backup window of some kind? I used to get this kind of behaviour periodically, and it took me ages to put 2 and 2 together and realise what was going on.