I’ve noticed similar events for Minecraft Pocket edition where it will only load to a certain point (usually around 3/4 of the way in the loading screen. I’m also experiencing this issue. However when I switch to cellular data it’ll load all the way and even enter my friends realm. At first all is well then what I’m estimating is about 3-5 minutes in (always varied but this is the average) my game will freeze and I’ll be forced to exit the game entirely and try again. As long as I’m using my data I’ll be able to get onto the realm just for those 3-5 minutes. I play on an IPhone XR and I’m an operator on this realm and one of two people on the realm that has the ability to help via commands. This is really a very unfortunate event given I’m in charge of development, building, and helping those in need on the realm specified.