Lyman, you're going so far off the deep end by coming up with these ever more elaborate excuses as to how it must have been the aircraft's fault that you have now officially transited the boundaries of known space into la-la land as far as I'm concerned.
You're trying to parlay the autoflight's interrupted response to a comparatively large bump from turbulence - of which not one cycle was completed before the PF took control - into a hitherto-unknown phenomenon that you've just invented. I mean, extrapolation is one thing - but what you're suggesting has not only never been known in the hundreds of thousands of hours the type has been in service, but completely contradicts the evidence at hand.