Activity stops automatically after 15 min break

Hi 

When I start cycling / running with my garmin Vivoactive 4 and I have a break, after15 minutes the activity will save and end automatically... 

Is there a setting where you can adjust this? Never find anything about it in user manuals or on Google..

Very frustrating that you see in your Strava for instance 4 trips uploaded instead of 1 single ride...

Would be great if someone could help me with this...