A little update on my end, I bought an official licensed Mission Engineering EP1-L6 to see if that did work. Sadly I have the exact same problem still, so I think it might be a bug or just a faulty unit. I spoke to Mission Engineering about it and they said it would be very inlikely for it to be the expression pedal unless I would have bought a faulty unit, they think it is most likely a fault in the Helix itself. I'm gonna try to have Thomann take a look and repair both and if that doesn't work I am asking for a refund because this is ridiculous.