Hello and welcome to Apple Support Communities, Dancerinpink.
If we understand your post correctly, Location Services reverts to 'While Using The App' instead of 'Always' for Google Maps. We’d like to help.
Make sure you're following the steps in this article:
Turn Location Services and GPS on or off on your iPhone, iPad, or iPod touch
Make sure your iPhone isn't in Low Power Mode:
Use Low Power Mode to save battery life on your iPhone
If the issue continues follow the steps here:
If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open
Let us know if that resolves this issue for you.
Thanks for using the Apple Support Communities.