Strava Not Recording My Run or Updating

I use Strava to track my runs and bike rides which has been working great on my old Samsung Galaxy S4. I recently got a new Samsung Galaxy S6 phone and at first it was working great but a week or two ago it started playing up. I got home and it had not tracked my run, it has GPS at the start and at the end when I went to finish the tracking but nothing in the middle. Very annoying but I hoped it was just a random day when GPS signal wasn’t strong or something. Anyway the next day I went for a short run again and kept a close eye on it this time. It got GPS again at the start so I set off, a few meters down the road it was clear that the tracking wasn’t working but when I unlocked the phone it picked up GPS immediately.

Fix
Its easy to think something has broken on the phone or in the app but the above pointed towards a setting on the phone that was stopping the tracking from working. When I looked into it further it didn’t take long to see on the alert ribbon “power saving mode enabled”.

Samsung Galaxy S6 Power Saving Mode Button Menu
Samsung Galaxy S6 Power Saving Mode Button Menu

I must have accidentally pressed it when scrolling through the menu. I turned power saving mode off and tracking immediately worked again. Posting this for others who have the same frustrating issue.