Weird noise in my rect-o-verb reverb when I switch channels!

[gottapaul]

I don't know if it has always been there or I have just tuned into it today? But, All of the sudden I am noticing that when I channel switch I get a reverb pop?

Model:
I have a version 2, and it's the 1X12 model....don't know if that makes a difference?

 

[gottapaul]

I don't think I am explaining this too well.

ok....I'm in my drive channel (reverbs on both channels) I play a line on my guitar. I stop and hit my footswitch to go into the clean channel. Then I get like a power surge going through the reverb almost like an echo.