Standard Assets propeller plane crazy transform (Unity 5.1.2)

I'm not sure if this is a bug in 5.1.2 or the standard asset in general but the propeller plane prefab from the standard assets is behaving very erratically. The transform position and rotation are unstable and the plane is shacking and rotating slightly every time I hit play.

I tried downloading the standard assets from the asset store and importing from within Unity using Assets/Import Package/Vehicles. Also tried the provided sample scene (without any modifications), a new scene with just a plain and the airplane and even removed all scripts attached to the thing. In all instances the airplane wouldn't just stand still.

Any ideas? are others having this issues as well?

Edit: I'm thinking it's more of a 5.1.2 issue, Unity now crashes every few minutes also since the updatge. Never had such issues before.