Bedrock Realm Lag, and Disconnect

So I am currently trying to give my friend a tour of the realm I've been working on for years and whenever we connect to it we get on for like 20 minutes and then we disconnect, and it rolls back to a previous save state, this has happened a multitude of times and I was wondering if there is any way to try to fix this, Edit: not sure if it matters but I'm playing via Xbox, and he is playing on Playstation.