Basically, it's sort of a bug, but you can work around it: There is sort of a 'hidden' parameter that controls whether the ribbon X resets or not. This is sometimes toggled on and off globally (not per-voice) in a strange fashion,
Quoting a post from a different site (this is the only post there you need)"Not sure if anyone else has noticed this, but if you make a new patch and save it then assign a parameter to the X-axis of the ribbon it glitches. What I mean by this is, normally if you press the ribbon down and let go it will hold where you left off. If you switch to a factory patch where the ribbon X-axis is set to reset once letting go, then go back to your patch the X-axis now resets. The only way to get it to work properly again is to switch to another factory patch where the X-axis is set to hold, or turn the AN1x off and on again. Discovered this yesterday when I was trying to set up the X-axis to reset. Also if you switch from your patch with X-axis hold to another of your patches with X-axis reset and back to the first, the X-axis will still be set to hold on that first patch. If you still have all the original patches, or have replaced all of them you won't have this problem."