I have submitted this same issue with OnePlus.
I am on my second OnePlus 7T Pro 5G purchased directly from T-Mobile and the phone is not able to hold a GPS signal while getting directions in ANY mapping app (eg. Google Maps, Waze, etc.)
What happens is that you enter a destination in the mapping app and start the directions. A use case used a bazillion times by a bazillion users. On your route for no rhyme or reason at no specific interval, the mapping app will lose its connection to GPS and the arrow where you are on the map will freeze at your last known location. While you continue on your way, at some point the mapping app will reconnect to GPS and find you and you will "fast forward" to your current position on the map. This happens multiple times during your travels at varying intervals.
I have captured this with a screen recording using an app called GPS Test simultaneously with Google Maps. The link is below. The time stamps of note are: