(before 1.14.60)me and a few friends wanted to play together, but when we tried to join someones world, one person's skin would dupe to someone else so they both had the same skin. This issue also happened on realms. However, it wasnt an issue on LEET servers before 1.14.6, and that worked for the time. But when 1.14.60 rolled out and the servers were updated, the skin issue came onto servers as well. As far as I know, this has been a common issue for mobile users for a while now.