There are rumors that there were 2 pilots aboard, and that one of them accidentally triggered autoland, and they couldn't figure out how to turn it off:

https://vansairforce.net/threads/garmin-emergency-autoland-i...

And also didn't know how to work thr radio? Surely autoland doesn't disable communication

seems like an unlikely rumor to be true at this time

There's a rumor, that you are propagating. One person, Tandem46, made this claim ... no evidence provided.