That's weird, I'm not seeing that. What pedal are you using, and have you recalibrated it recently?
For what it's worth, I upgraded to 1.14 tonight, recalibrated the expression pedal, then spent 5-10 minutes fooling around with it, listening (controlling filter cutoff on a synth patch), and watching the values (knob1 is set to control the same panel, so you can watch the numbers on the "main" screen). I don't really have any objective measurements, and this is the first time I've used the pedal in a couple weeks. But subjectively, it seems good now. The changes seemed smooth across the range, and I didn't notice any jumping. I'm using a Roland EV-5, which is one of the pedals that manual claims as supported.