Whenever me and my friend are together, we can never join eachothers worlds. We are both on mobile, and it's only when we are together that it dosent work. If we are apart, and we join eachother world, its fine. But if we are hanging out, and wanna play some minecraft, it always says "unable to connect to world" I've looked up how to fix this and it says to make sure we are on the same local wifi (wich we are) and it still dosent work! Pls help