Hey everyone! I know this is an older post, but I just ran into an issue with my Helix after a few years. At first, I thought it was a hardware problem, so I opened up the unit—though I wouldn't recommend doing this if you're not sure what you're doing. Eventually, I discovered the solution on an old Reddit post. Here it is for anyone else experiencing the same issue:
"When you turn on the Helix, make sure the expression pedal is at 0%. It calibrates every time during boot up."
The original solution actually mentioned 100%, but it's supposed to be 0% to calibrate properly.
Hope this helps!
cheers