Source? In the Juan Brown (a 777 pilot YouTuber) video (https://youtu.be/cslSQB5mgyc) referenced in another comment, he specifically states that you must physically fight the autopilot for control if it's engaged.
The 777 pilot who analyzed and explained what was going on says otherwise. It will cause a master warning or something along those lines, but not cause AP to disengage. Which makes sense.
Let's leave the incident investigation to the professional investigators anf authorities, shall we?