AFKing in lava turns skin pink

If you go in lava, leave minecraft running, and then return, your skin will have turned entirely pink. Results may vary, and i was n lava for about 3-4 hours before returning. Coming out of the lava does not fix it, the only way to fix it is by leaving the game.
Below on the left is a screenshot of my normal skin for comparison. on the right is the glitch.