GPS Tracking stopped after selecting "Resume later"

I am using a Forerunner 955 with version 19.18.

Last week i did multiple hikes. At two days there was a break for lunch, where I stopped the activity and hit "Resume later". After the break I resumed the tracking until the end. Unfortunatly the GPS track is not recorded after the break. Everything else (like heigth, heartrate, and so on) is still recorded and visible in the Connect App.

I am using the satelite-configuration "UltraTrac". Is anyone else noticing similar behaviour?