What causes one tire to cup or feather or whatever this is?

[Bones]

Sorry I was mid informed they are the sailun terra max h/t. LT235/85/16

I think what we may be seeing here is the fact that LT tires have more grip and when the tires pivot they are causing the feathering because the tread is going in a direction they are not designed to go. I think this is called tire scrub.