When I get in a world with my friends, for some reason I'll have one of their skins or one of them will have my skin. Usually I can fix it, but if I'm playing with just one person then when I try to change my skin to mine, they'll get my skin. So they try to change it so they can have their skin, and I'll get there skin and it's just an endless cycle and it's incredibly annoying, especially since it happens literally every time.