When I was checking the inventory in the newest snapshot (as of week 42) every single block in the creative and survival inventories. I can't think of a way to fix this, and I think it's the version. 

Items such as maps and dyes, don't seem to be affected by this.

Also, the player model in the inventory also has a weird glitch. The opposite happens here. The model is darker than usual.

Please see the screenshots below.

DenFraekkePanda