Join tournament doesn’t work proberly.

Hi, im currently having an issue with tournaments, when i click join, it says leave now. which makes perfect sense. but as soon as i update the site ( F5 ) then it says join now again, which is a huge problem – because i can’t really join my own test tournaments with a test user. Can’t seem to find where it fails.

This text is pasted, as i wrote in discord chat but sadly didnt get any answer.