Heart rate no longer syncs from Edge 840 activities (secondary training device)

I have Forerunner 265 (currently 23.13) and Edge 840 (currently 26.18) and noticed that the heart rate (and thus intensity minutes) stopped syncing to Garmin Connect. The last successful sync was April 3 and then I noticed the first unsuccessful one on April 4 (no firmware or app update done in between). The cycling heart rate is recorded using Polar H10 strap and is available for viewing within the activity in Connect. Physio True Up correctly updates training load from both devices.

0 druidh 2 days ago

FWIW, I've done three rides this week using my Edge 840. One using a Magene HRM and two using my Fenix 7 as a HRM. All three show heart rate and have intensity minutes in the statistics. My Fenix 7 is set as the primary training device.

What do you mean by this though?

Zdendulak said:
The cycling heart rate is recorded using Polar H10 strap and is available for viewing within the activity in Connect

Do you mean that it normally shows in Connect but has now stopped?

0 Zdendulak 1 day ago in reply to druidh

It had been working for me for many rides but stopped recently. The segment of the day when I am on the bike does not show HR in the graph (and thus no intensity minutes either).