So I have tried countless times to connect to a friends world and vice versa. Both of us on xbox one, my NAT type is open and have no restrictions to my account, and same goes for my friend. We both don't experience any issues with ANY other games when it comes to connecting online. This "unable to connect to world" bug has been an issue apparently since the launch of bedrock but still somehow has yet to be fixed. Every forum I have found has not given ANY helpful advice that I have the tech know-how of doing.