Could it be that the electric stop is at 13 degrees UP ?
No, not that I am aware of.
It's nowhere mentioned in the manuals.
On ground Autotrim is disabled (Ground Direct Law) so we are unable to simulate.
IMO the THS was arriving @ 13 Up when all the speeds went off (02:11:50) due hi AOA (40) and (15 Pitch) = (60* degrees on pitot mouth) and therefore PRIMS cancelled any further THS command. (DIRECT monitoring??)
* Even a few degrees more because pitot is pointed some degrees above horizontal.