My Vivoactive 4 always turns off when saving activity

My Vivoactive 4 watch started to turn off, always when saving activity. The activity is saved in my phone (or in the cloud) but its frustrating that I have to turn the watch on every time after I run or bike. I see that there are other topics like this in the community, but they are either locked or outdated. None of them offer a solution that worked, and it seems like many have the similar problem, therefore I must open a new one in hope someone will offer some help. 

My watch is relatively new, I have it little over 2 years. The battery is good, lasts for 2-3 days depending on the activity rate. I mostly have good battery % when running or biking. 

Has anyone managed to resolve this. Please, please, please help.