CP5: The throttle doesn't respond until the throttle pedal is pressed about 30%.

I purchased a C5 and even after setting the throttle pedal’s “set min/set max” in the Cammus software, it doesn’t respond for about the first 30% of the pedal travel.

The brake pedal responds from the start.

Could this be a hardware issue?

PC Device Version 1.6.17
USB CP5/CP9 Pedals Firmware 9
C5 Wheel Base Firmware 1.7.9
C5 Steering Wheel Firmware 21