Can someone with a KPA confirm an observation

[AFKAEjay(retired)]

I’m trying to use a toaster in 4cm and run into some strange stuff, looking to confirm my observation:

Turn off the stack (amp/eq/cab), set a Kemper drive in block A, set the mix at 100%, monitor at mains out.
I get both a clean as well as an overdriven signal in parallel…shouldn’t happen, I can’t think of a setting that causes this.