Calibration?

Hello,
I got a second hand Rainmaker and starting to really understand this beast and having a lot of fun.

I did the last firmware update with success but it seems that my pitch shift pot has an offset of 1 semitone. I have to put it at 11 o’clock to have a neutral render of the pitch of my signal source.

If the pot is at 12 o’clock, I have +1semitone on the wet signal.

All pitch shift parameter on tap edits are set to 0.

Is there a way to calibrate or doing something that solve that?

Thanks