BE-100 FX loop with ISP Decimator Pro Rack G

[Jmcthe3rd]

I have a BE-100 with an ISP Decimator Pro Rack G in the FX Loop and a Soundsculpture Volcano running into the front of the amp as a boost. As i turn up the Volcano for a boost I start to hear more and more hiss coming from the speakers. It's not horrible or very loud but, I just thought it was odd. I'm not sure how this is happening unless the input is somehow feeding into the return of the FX loop. I haven't noticed this on any of my other amps.

Any one else experience this issue?