PS4 won't allow others to join my world or other players ps4 worlds very consistently.

whenever people try to come to my world they are usually stopped by an "unable to connect" screen. I've done everything I can even uninstalling the game but it won't work and is consistent keeps people out or going into someone else's ps4 world. I have a stable internet connection so that is not the problem. I will add that very rarely it does let one or two people in but never 4 so far. Also, I am making this one not as a duplicate because the other one is for older versions and I've only experienced this specific kind during this 1.16 update. please don't make this a duplicate because I am almost perfectly certain this is a new version of the problem.