Perhaps I am missing something here as this technical discussion is quite esoteric but Boeing advise ...."failure condition that can occur
during manual flight only." The bolding from Boeing.
So all this discussion around pilots being under skilled and not being able to sort out an issue after disconnected the AP becomes even more interesting as the FCOM bulletin suggests that if the AP was flying the issue would have been resolved? Perhaps there is more significant information to come, perhaps once the FDR information has been released. At this stage it is about
PR departments getting in with their version to bias the discussion to suit corporate aims.