Weather widget not showing current temperatures

The stock weather widget only very occasionally shows the current temperature outside. Most of the time it just shows a double dash. At first I thought the garmin connect app loses connection to the garmin watch. But the minutecast app works like a charm.

Coule you please look into that? When I want to know the temperature I always have to ask my wife. She just takes a glance at her Apple watch and it always just works… 

I attached two screenshots. 


Thank you in advance!