Dave your previous might be misinterpreted on two counts.
‘Flight envelope’ implies an in-trim condition (speed?), whereas if the more likely tech design was that the trim cutout was relative to the tail angle then the crew could encounter very high stick loads relative to that required for the aircraft to be ‘in trim’ at the actual speed.
The reports / FDR did indicate that the crew attempted to use elect trim at larger tail angles, but without movement. Unfortunately there is no indication of this being relative to any elect trim inhibition, not known (or trim direction?), nor if this was due to high mechanical loading or purely elect inhibition.