Hi,
Ok .. the test was performed at a low altitude and this is a error of the pilot(s)
But .. you can't discard this from the scenario:
First, a critical failure occurred and this failure was not enunciated to the pilots.
Second, the aircraft automation safety system failed because of that critical failure.
This can happen again .. it's not belong of pilots decision or missjudgement.
This is a black point and must be fixed