Ugly Textures

Umm As the Summary Says Ugly Textures When I Spawn Something With Arms It's Arms Disappear By Summoning them like this /summon pillage ~ ~ ~

{NoAI:1b}

There Arms Disappear And When I Take Something From The Creative Menu some of The Items Are Discoloured And Some Of Them Are completely Invisible This Only Happens in my offhand 

It's Really Disturbing and Should be Dealt With i've Had smaller Problems But This Is Big