There are a few maps on the server that have issues with playerstarts/spawn points that I let slip through the map quality checks. The problems from this become much worse when the server is full or near full and the symptoms are what you describe. Usually, just reconnecting will eventually get you in to play. Looking at the recent maps played, I expect it was the 6H-Hyteology map which I remember has this issue.
Is it all good for you now that the server is on different maps?