Expression pedal problem

Do you have Wah > Volume ticked in the system menu?

This allows you to use the same pedal as both Wah and Volume. If Wah is active the pedal serves as a wah pedal but if wah is not active it becomes a volume pedal.

That’s very strange. I’ve never experienced anything like that.

Open a Support Ticket, never heard about such an issue

Here https://www.kemper-amps.com/contact

are you using a second pedal input for the footswitch in the pedal? Which function is assigned to it on the corresponding pedal settings page?

how are you monitoring the signal?

Are you experiencing the same issue when you listen through headphones connected to the Profiler headphone output?

Check your output source settings and make sure you use Master Mono or Master Stereo. Only these two will give you the full signal chain.

I have no idea how the issue you are reporting could be caused by using an expression pedal that is configured as a wah pedal though.