Autopilot not doing what it is expected leading to a too low approach sounds a bit like the 777 crash in S.F.. There it was not a bug but the hidden modes in th

Autopilot not doing what it is expected leading to a too low approach sounds a bit like the 777 crash in S.F.. There it was not a bug but the hidden modes in the automation leading to deviation of what pilots thought the plane would do and what it did.