[Elecraft] K3S CW AGC-F Not Working?

[Tony]

All:

I noticed that he AGC-F setting on my K3S seems to have no effect when 
in CW mode yet it works in SSB mode. When switching between AGC-F and 
AGC-S the decay is slow so it appears to be "stuck" in the AGC-S setting 
when in CW mode.

The AGC settings are:

AGC DCY = SOFT
AGC HLD = 0
AGC PLS = NOR
AGC SLP = 10
AGC THR = 10
AGC-F = 130
AGC-S = 8

The rig (SN 11829) was factory assembled.

Any ideas?

Tony