Since the update, the scarf obviously using the same model now as the Shemagh is i've noticed bugged.
It now removed the collars of the top you are wearing and it is grossly clipped onto the chin of the character leaving the bottom around the neck exposed.
Before the Shemagh was added the scarf was perfectly fine.
The Hill backpack when you load into biv's phases out from a 45 degree angle on the back to normal, and when entering and exiting vehicles it turns sideways along with your weapons when the action is performed.