Alright,
So Me and my friend play a lot of Minecraft and play together every once in a while to build something together, however when we DO want to play together it keeps having the issue where he can't join my world. I've tried turning off add-ons with behavior packs and texture packs but still won't let him in and now even worlds I have only built in with nothing outside vanilla won't let him in

I'd like to know if there's a way to fix this or if Microsoft can fix it as its been going on for the past year