This might be related to https://forum.kurviger.com/t/navigation-stops-automatically/302
See also documentation Why is the Kurviger App stopped / killed or why is the GPS signal lost in Background [Kurviger Knowledgebase]
See also Don’t kill my app!
Have you recently done any OS updates on your smartphone?
Is the issue still there if Kurviger APP stays in foreground all the time?
“Google Maps” is special as it is well known by all vendors, and is most likely preinstalled by the vendor as a system app.
Manfred