Strange glitch with a texture pack

I’m using the Odyssey texture pack which I purchased through the store, when I fly around in creative using the texture pack at certain points I’m surrounded by what I think is a giant version of a mob, like I’m inside it’s head and I can’t see anything until I move. It’s very hard to describe but it’s very annoying as it’s making that world nearly impossible to play on. It only started happening after the latest update. Please help.

 

Thankyou