I have recorded activity on both and Edge 810 and fenix (1 - the original). Taking the fenix as an example, normally I would activate the Bluetooth on the watch and open the app and after a few mins, all will be synced. Activity appears on the Connect site and then syncs to Strava.
Now, it fails every time. I have tried turning both devices (phone and watch) on and off, un-syncing the bluetooth connection and re-connecting, turning bluetooth on and off, re-installing the connect for mobile app and am stuck.
Checking the bluetooth connections on the phone, the fenix is a know connection and shows connected, but the bluetooth icon flashes on the watch like it's searching for a connection. I cleared the device from the app and then go to connect it again and it finds it, but when setting up, times out while connecting to device. It's always been a bit haphazard, but this is a new level of low. Help, please. I'd like to not have to carry a cable and laptop about everywhere in 2018... Or how about just allowing me to link to Strava direct, like other manufacturers...