Apple Maps and Google Maps accuracy issues in iOS12

I’ve been using both Apple and Google maps for quite some time and never really experienced location accuracy issue except some obvious drop due to remote location. However, ever since I updated my iPhone to iOS12 beta and now the official release, I see both maps just couldn’t pinpoint my location as it supposed to, it may have to wait for 30 seconds or a minutes to let it works initially, and through out the route, the accuracy just go up and down.

I original thought this might be my iPhone 7 issues, but then problem still occur when I switched to iPhone X.

I’m on latest iOS and the latest version app. Anyone has the same issues?