Realm Join Skin

Whenever my sister joins a realm there is basically a 50/50 chance she loads in with her classic skin. If she doesn't, she ends up with 1 of 2 skins that are not steve or alex. Please fix!

To Reproduce:

Make a custom skin

Close the game

Open the game

Join a realm

(Note: You have to be the second player and there is a 50 50 chance of this working)