Kemper audio pops

Hi,

I'm running my Kemper into my Axe Fx III loop and I'm getting a strange artifact. When I play a bit and stop there's hissing pop, two times. Every profile change either from the rig manager or in perform mode is the same effect. It's less audible on distorted profiles but a huge volume jump on clean profiles.

Magnified:

Mp3 example:

https://soundcloud.com/roborules/kemper-pops

No noise gates on Axe or Kemper. Output from Axe to Direct In on Kemper, XLR or TRS makes no difference.