My skin changes perfectly fine when I join some servers, but when I join a mini-game, like in Mineplex or other servers with mini games, my skin changes back to default. It remains that way when I exit the mini-game too! On some servers, my skin won't change at all. It stays default. Why is this? I've tried downloading the skin and then uploading it to minecraft.net. But that doesn't help... I've tried different skins too. They all go back to steve. I can't wear any skins...