Skin not showing in servers only if I delete the game

when I play any world that i made or any made I can see my own skin and others can see it but when I join any servers for example: the hive, cubecraft, I can't see my own skin my skin will be Steve/alex and others can't see but if I delete the game I can see my skin in Cubecraft and hive only one time and if I close the game and join it it will be Steve/alex