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 I see that there are other topics like this in the community, but they are either locked or outdated.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. 

  • I have been facing the same issue for a few months when saving an activity or when manually connecting to wifi. Yesterday I went into Settings / Wifi and turned off the Auto-upload option, and it worked! I'll confirm this in the coming days though, but my intuition was that auto-upload means that when saving an activity, it tries to upload it to Garmin Connect immediately, via Wifi or Bluetooth. If bluetooth is on and the phone is nearby, no issue, but if not, wifi takes over and it crashes. 

    Let me know if this works for you as well.