Basically, if I am not connected to the same wifi network as a friend, I am completely unable to join their world. I've used the PC, Android and Xbox One platforms and none of them have worked. Even if we're on the same version it doesn't work, it just says "Unable to connect to world", but doesn't tell me why. This problem has been occurring for years, and it is perhaps the most annoying bug I have ever experienced in gaming.

The video shown is a similar issue where it almost loads and the friend even sees my name but I still don't load.