As I continue to polish things up with this remarkable aircraft I experienced something new.  I was shooting the RNAV Z 21 approach into KCEZ (Cortez, CO) and was just crossing the threshold.

The annunciator suddenly went off yelling "too low" and "pull up".  Of course I was low.. I was landing. (Gear was down with full flaps).

Anybody else experience this?

Doing a self-update on this.  From what I can discern, some of the issues I've had (errors in VNAV TODs and inappropriate terrain warnings) appear to be due in part to a livery pack that I've had for some time.  As I've had these liveries long before the AAU1 update it may be related to some incompatibility there.  I've removed those liveries and achieved some uneventful flights.

However, on one approach where I flared a little too much and too early, I ballooned a little before settling back down.  After this balloon I received the ""Too Low" "Terrain" warning again, so it may trigger if the aircraft climbs back up after re-crossing the 50' AGL height?

This warning also triggered once during the final approach sequence of an RNAV/LPV approach over tight terrain clearances.  Since the aircraft was spot-on the GP for that approach, maybe they've modeled this a little outside of the envelope?