I reported this also separately but here goes my issue:
I have Apple Watch (original series), AirPods, iPhone 6s with all the latests updates (the ones released on 23rd of Jan). When going running, and using the Strava app on my Watch, i turn on a Podcast on my iPhone 6s via the Apple Podcasts app. The music plays for approx 10 minutes and then the podcast app pauses the music automatically. I have to press the play button to resume. After a 5 minutes or so, this happens again, and then again the next 5 minutes and so on.
When listening to music without Strava and not running, this does not happen. When running, i have my iPhone in my hand, so i have ruled out a possible connection problem by having it deep in a pocket so that the AirPods can't connect. Also, the Strava app keeps talking to the AirPods (with the running time updates), but the music from Podcast automatically stops. Then I switched to Spotify app and repeated the same as described above, and i have the same pausing problem. The Spotify app automatically pauses after 5 minutes when using Apple Watch, AirPods, iPhone 6s and the Strava app.
I have already done an AirPods reset and re-pairing, i am on the latest iOS and watchOS. i have rebooted the iPhone and Watch. Also, i have the auto-pause function in Strava turned off at all time.
Any suggestions from you are very welcome to solve this problem. Currently i have to go back to a wired headphone to solve this problem.