I have a 2021 M20 Gain connected to the ebike page on a Garmin 830. At least once a ride sometimes more my Garmin shows a message at the bottom of the page “Ebike sensor battery low. “ Today it even said dangerously low. I can’t see anywhere that a speed sensor, if that’s what it’s referring to, can be accessed on this bike. The bikes battery is always adequate when this warning appears. Anybody know if it’s something with the Garmin or the Gain?