iCode Duo BLE not detecting/reading paddles

I have been unable to get paddles to work with my iCode Duo BLE (Frimware v9.06 - H4). Auto mode fails to detect the paddles and on mode does not register any changes when the controller knobs are twisted but the buttons are working correctly. I have ensured that the paddle controllers are still functional with a multimeter at the DB9 connector. Is there anything I should do to further debug this or preferably get paddles working correctly.