Hi,
random join depends on your game design, but in your case, I think you might several problems stacked together.
- are you in the same region? if not, you won't get into the same realm and players can't play together.
- how many rooms are currently opened when you ask for a random join, if you are only two players for this app id, and you are in the same region, then you will definitly joint the only room existing if you ask for join random.
so check your metrics and various pun data to make sure you are in the right environment and context for join random room to work.
Let me know your findings
Bye,
Jean