I disagree, prop going into flat pitch or even worse Beta would cause such an aggressive yaw and roll that the airplane would be upside down in mere seconds if that.
I doubt the autopilot was three axis, so no rudder input.
Engine failure would lead to increasing aileron deflection to maintain heading till full defection and autopilot disconnects and and asymmetric stall leads to a spin.
Beech Queenair accident but imagine flying 200kts and a prop going beta.
You’d be upside down before you knew what happened.