[Elecraft] New K3, no "Fast" AGC it is same as "Slow" AGC

[Dean]

An issue that I am having with my K3 is that the "Fast" AGC actual decay time is the same as the "Slow"  AGC actual decay time. If I adjust the menu decay time for the Fast AGC it has no effect, but if I adjust the menu decay time for the Slow AGC, it effects both the Fast and Slow AGC positions. In effect, I have no Fast AGC. 

My K3 came with firmware 3.68 and I upgraded to 3.76 but they both have the same problem.

Any ideas?

Thanks!

Dean