Whenever I try to join a open world and it has one spot left before max players then it count me as another player before I even get in and says that the server is full.

I clicked on a someone elses world to join it and it said 4/5. Then before I got in it said that the server was full and I could not join. I think that I was counted as another player before I got in and since i made it full, it kicked me out because it thought the game was already full. Pls fix this.