So, there is this annoying recurring bug. When my friends join my world, they don't see my skin, and if they press ESC to see my profile (from Xbox), it's as if it doesn't exist. At first, I thought it was a problem with Xbox, but it seems it isn't after all, because if they leave my world, they can see my Xbox profile with no problem. 
However, if I join one of their worlds (And as such, the friend I join is the host) I can't see their skin (It becomes the default one: Steve or Alex) and if I then go on to press ESC to se their Xbox profile on the right side it's as if it doesn't exist.
This is not super serious...but it's very bothersome in my opinion.