Custom Skins Issue

Whenever I try to use custom skins on Minecraft.

It makes me "lose" connection to the marketplace.

Including Realms and Servers.

And Attempting to join another player's world via invite or manually joining from their profile, ends up being invalid.

The only way I'm able to play with others is by restarting the game, making the custom skins unusable. Starting to wish for a import button in the future.