Running steps not being counted on a single activity

Did not you, by mistake, start a Cycling activity, instead of Running? Steps are not counted during a Cycling activity, during Running they are. Another possibility would be if you've run on a treadmill and held on the railings, or ran outdoors while pushing a pram or a caddy - when the hand with the watch does not move, the steps cannot be detected.

Thanks for the answer.

Nope, none of the options you mentioned. I did as always: start my running activity and go. No treadmill, no caddy.

It happened again yesterday. New run, no steps counted.

I suspect it could be correlated to the interaction of my two devices. I have a Fenix5 and a VivosmartHR for daily use. When I go running I take off and shut down the Vivosmart and put on the Fenix5.

I know that if I keep both devices on, steps are counted twice. Maybe if I take off the Vivosmart I should leave it on (sitting on the table) while running with the Fenix? Weird but it's the only idea I have.

You have to set the device you want to use for the tracking as the Preferred Activity Tracker in its Device Settings. 

Steps are not counted twice. The TrueUp feature, if enabled, uses the steps from the device that has the most steps during a time span. So you can wear both devices and not worry about that. 

Thank you guys.

First, I realized I did not activate before the TrueUp feature on my Fenix5. Now I did... let's see.

Yet, I still don't undersand why this would happen SOMETIMES. If it was a matter of wrong setting, GC would not record steps while running ever. On the contrary it is recording steps in some runs and not in others.

I also wonder wether it is more convenient to keep the Preferred Activity Tracker option on the Vivosmart or the Fenix. I would like not to loose steps on either devices.

The primary tracker is needed for sleep tracking so perhaps that's your answer.

Resuming this thread because I changed my Fenix5 to a Fenix6 and the problem is back again. TrueUp is enabled, Fenix is the primary tracker (although it shouldn't matter) but all my runs steps are not counted. If I go to the steps page, when the runnign is marked there are no steps.

Could you post a screenshot showing the problem, and also a link to the concerned run activity?

You could also try the hint #4 from the Troubleshooting guide for (some) data missing after syncing

As you can see I did a 10k run around 4pm (green mark) and the steps count is flat.

This is happening with all the runs since I bought the new Fenix6

Ain't you, by hazard, run on a treadmill, keeping your hands on the handlebars?