Garmin's Smart Glide and Prop Position

[PT20J]

15 minutes ago, donkaye said:

I experienced the same thing during my test.  I was interested in whether Smart Glide would recompute an airport that came into range when initially no airports were in range.  It wouldn't.  I pushed the alternate airport button and the Smart Glide then worked for the recently acquired airport.

That's how it is designed. When activated it makes a decision based on the information available at the time and it won't change it unless you manually select an alternative.