You sadly you can't fully perma prop this entity, What you need to do is Perma prop the hull and add the physic models from the prop list and place them as a hidden foundation. Now it should work and you won't have the weird broken (Client) Animations.

Or download the Dupe that's already Made https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1703852646&requirelogin=true