I am having issues with expression controls on a Helix Rack connected via MIDI to a Roland FC-300 foot controller. The Helix responds intermittently throughout the pedal movements on simple commands such as volume, single parameter values, etc. Pedal and cable are confirmed to be in perfect working order. Customer support has not provided any solutions as of yet. I also found another user with the same issues on a forum thread, tho it's been a dead thread for over a year and no solution was ever posted. Any help greatly appreciated.