Garmin Fenix 6X Pro Heart Rate not working

Hi all, 

Can anyone help!

Noticed a few days ago that my wrist heart rate sensor isn't working. I've installed the latest software update and nothing has happened. Has anyone else had similar issues? The Baro, Alt and H / L are also not updating.

Chances are this will be a quick fix but I've currently tired everything, including a full system reset on the watch and nothing has helped.

Thanks in advance! 

Andy