When changing your skins on servers, it doesn't change your skin. Its kinda annoying, so you  have to rejoin again to see that your skin changed. When in the pause menu, that skin has changed, but the skin in-game is not changed. I'll send an attachment later, for proof.

Steps to Reproduce:

Step 1: Join a server

Step 2: Go to the pause menu and go to the skins changing menu.

Step 3: Change your skin, after that back to the pause menu, you see that your skin changed, but in-game your skin doesn't change.