I don't claim the slighest expertise on that. The cruise line is blaming it on a massive steering failure, so maybe something made the rudders, thrusters, and everything else suddenly kick in.
The idea that it was a terrorist attack blows my mind, but everything since 9/11, including a smidgeon of coffee creamer on the counter in the coffee bar at the office, has been attributed to terrorists, at least temporarily.
She uses azipods - does not have rudders. Propellers are tractor type, pulling vessel through water and the props are connected to electric motors which are just aft of the props. The entire assembly pivots like an outboard motor. Norwegian Star had a similar problem a few years ago entering the Strait of Juan de Fuca returning from an Alaska trip.