Completely black mobs on 21w13a

 When I created a new world, I decided to spawn some new mobs like the goat to see them. But, everytime I spawn a random mob, its skin is completely black, and the items in the hotbar are more darker, the same happens in the creative inventory and the advancements 'popup' everytime you complete an advancement. No other resource packs where used. The same issue happened for 21w10a and 21w11a.