Sticky reverse button
Same problem, recently. It happens with the cruise control button. Last winter I took it completely apart and cleaned/sprayed it. Worked fine in the garage . . . but as soon as it got out in the 45* temps, it quit working again (stuck 'on'). When it got above 75*, in the Spring, it began to work just fine again and never had a problem until lately. I'm calling it a seasonal problem.
The reverse button is more of a serious problem. I backed it out of the shed and couldn't get it to go to neutral. Turned off the bike and turned the key back on to release it. I don't like it. Prolly gonna ride my other bike this winter so I don't have to deal with the pain in the butt.
High tech micro switches, my foot!!