Polar H10/Apple Watch won't stay connected

Like JustHonda (My Polar H10 will not stay connected to Apple watch during my workouts.), I too have a problem with connectivity between my Apple Watch (series 3) and my new Polar H10 (not using the Polar app-I only have the H10 connected to the Watch). When I first connected it, it worked fine for a couple of weeks. Then it stopped staying connected. When I strap on the Polar H10 I check the watch's Bluetooth and it's not paired. I tap it and it changes to show connected, but the watch still doesn't use the H10 for heart rate monitoring. I can tell because not only are the measurements wildly wrong, but the watch's monitoring lights on the underside are lit during a workout or when the heart rate app is up on the watch (they weren't during the first 2 weeks when the connection was working). My watch is on the latest WatchOS (and has been since well before I got the Polar H10).

My workaround: I had the watch forget the Polar H10, and then I reset the Polar H10 (remove battery, touch contacts 10 sec., wait 30 sec and put battery back in), then repaired it with the Apple Watch. It's working again. I don't know how long this will last, but at least I know a workaround until either Polar or Apple updates their products so they hold a reliable Bluetooth connection.