AZR
Thank you for the photos of the THS. (I can put my paints away !)
But it STILL leaves the THS moving for a whole minute going fully NU. Surely this should be unusual in (what was nominally) cruising flight.
Some smaller movements could be expected to be due to the routine automatic transfer of fuel or even passengers moving.
Both F/Os ought to have been alert and looking. Some of this is recorded on the CVR.