If they have been hacked then the days of commercial aviation are over.
I don’t know if it was hacked but I would bet money that it was hackable and I would bet money that this is the work of a government and that Electronic Warfare was used.
Kinda makes me go hmmmm...
Russians claimed recently they brought down a US drone by remotely overwhelming it and then controlling it.
If thats possible then the Chinese could as well.