Whenever I play with my sister (typically it’s a LAN game), my skin becomes her’s or her’s becomes mine.

Usually when playing multiplayer, I play with my younger sister. Usually, they’re just LAN games even though we both have accounts. More often than not, when she joins in, my skin becomes her’s instead. If I try to change mine back, her’s becomes mine. She can’t get the skin that I have so it’s impossible for her to be changing it and I don’t change mine to her’s because it’s to feminine for me and I can’t get it either.