Loop distortion

I was playing with adding a loop into the Kemper into slot D, using the "distortion loop". The issue I have is that raising the volume adds its own distortion, even when the pedals are bypassed. It's reacting like its a boost pedal? Is this the intended result? I had no other effects in the slots before it.

This is is not usable to me as it colors the sound and adds unwanted distortion.

Just to be clear, I am raising the loop volume and that is what adds the distortion. Not external gear levels

I was trying to raise the loop level
to bring it back to unity with the rig when it's bypassed. The level drops too much.
I will have to re-think how I am using the loop. Maybe a stomp boost when the loop is engaged? Or put the loop in a different spot.

Quote from Ingolf

Yes, but still, if the level of the loop that's placed before the amp is raised it will work like a neutral boost and add distortion.
You can even try this if the loop only consists of a cable going from send to return.

yes, I was not expecting it to do this.

Quote from viabcroce

Move the loop behind the Amp section, the behaviour should be as you want.

No not the behaviour I wanted. I want the pedals to push the preamp but not liking how it plays with pedals.
Its weird because before 4.06 it seemed to work ok . Now it seems different.