[ICOM] ICOM IC 775 DSP AGC Popping w/455 Khz Filter?

[JMILLER1706 at cfl.rr.com]

On this 775DSP, when I switch in the narrow SSB 455 Khz filter on 
receive, I seem to get AGC attack time popping or scratchy noise with 
strong signals.  Most noticeable when the passband (center knob) is 
tuned off senter.  The DSP and NB are off and AGC time constant knob is 
in about the middle.  Any others notice this?   Thanks, Jim N4BE