When I start Strava on my Apple Watch, it always used to stay Always On - which allowed it to be active long enough to collect heart rate data. For the last two days, when I start a ride, within about 10 seconds from starting a ride activity, the watch goes to screen saver and I have to touch the screen to reactivate Strava. Distance is recorded, but heart rate data is not. 

I have up to date iOS and WatchOS, and Strava app on both iPhone and Watch. I’ve reinstalled the Strava app on my watch. I’ve powered off both multiple times.

Appreciate any solution here. Thanks.