Eric,
I can’t really tell if the numbers are increasing smoothly when the jumps happen. It happens so quickly that I can see that some change has happened but nothing quantifiable. With jogging disabled it appears to track stick movement smoothly. The only way I can imagine being able to repeat this with any precision would be to rig up some threaded stick pusher thing and start turning it while watching the display.
I’m beginning to suspect that the encoders or potentiometers in the Xbox controller are just not reliable enough. Because it doesn’t happen every time I jog at slow speed, it’s probably not your plugin. Random events point me toward a hardware problem.