Vivoactive 4 Powers OFF when starting an activity

My Garmin Vivoactive 4 powers off when i start an activity. Be it when i go for a walk or start one of the various activities in the gym. Sometimes i cannot restart the watch until i connect it to my charger.

I always charge it so it's above 90% typically its fully charged before i start an activity but this makes no difference.

Is there a fix for this as it only functions to tell the time now ?