Submission delays

We recently ran a CTFd event and got a report for 2 or 3 users that after they’d hit submit they UI wouldn’t give them a response, then after a couple retries it would work.

Has this happened to others? Any suggestions on what we’d want to monitor on this?

We ran the event using AWS RDS, Redis and ECS services and over speced hardware for the event.

This can happen if CTFd errors out during the flag submission. The front end javascript will lock the button to prevent duplicate submissions but then won’t unlock it b/c it never got a response. Probably worth a fix.

But you should be getting some kind of stack trace to reveal what the issue might be.