Multiplayer Bugs (Very Annoying)

Hello. Ok so i have had minecraft on my xbox for a while now and it worked perfectly until one day. A few months ago maybe. Its unbelievable how many things i have tried to sort this out. Let me list them. Changing my Xbox DNS Settings, Restarting my router, restarting my xbox, restarting minecraft, reinstalling minecraft 2 times… you get what i mean right? Anyway, at first there was one glitch, that was not a fun glitch at all, people could not join my world and they would have “Locating Server” on their screen for ages. So i watched so many videos on how to fix this and it just seemed impossible. One day the glitch just vanished and then another day it came back with a whole squad of glitches. Let me list them. Being able to walk through blocks: head hight, not being able to join the world or realm, chunks not loading, players randomly disappearing, not being able to use commands or chat… you get what i mean.. Theres a lot of glitches with my minecraft at the moment and i cant really find a way to get rid of them… but the thing is, i have multiple other devices in the house that play it fine but its just my xbox that is having the problem, like i said though, i factory reset my xbox anyway so i wouldn't think that was the issue, im stuck in this situation and i cant find a way to get rid of the glitches. I need some suggestions ASAP as this is messing up my paid realms which i obviously payed for and its a bit annoying how i cant even join my own realm. Oh yeah forgot that one, i cant even join my own realm, i have to be invited to the realm by another player on my xbox. I really need help here. Anyone who maybe had the same problem or who is able to help?