Same issue with the Longitude. It happens whether I single tap the knob to change settings or if I spin it using the center wheel on my mouse. I first noticed it when I wanted to decrease my climb rate by 1000 FPM and clicked the DN button on VS but suddenly was pointed straight down at -9999 FPM because the dial had keep spinning until it maxed out at -9999.
Editing - it’s happened (randomly) on all knobs - heading, vertical speed, auto throttle, altitude…