Hey Nick, thanks for reaching out to me on this. To answer your questions:
I swiched over to the Eventide power supply and I still got the noises from both foot switches. Originally I was using a Cioks DC10 power supply.
With the inputs unplugged, I did NOT get any of the pops or other noises. Could it have something to do with my input signal. It seems strange that it would happen when I press the switches on the H9 but not happen when I change presets using a MIDI controller.
Other things I’ve tried include restoring factory presets and updating the software to the newest release (Spact Time version).