So i installed the new iOS 12 Beta 1 and everything worked fine for a while and was impressed by the new features but after 24hrs my GPS stopped working on any application that used it. Waze, Apple Maps, Google Maps, etc. Tried everything, researched and people had luck turn off/on locations services, resetting network, open multiple GPS using apps all at once, multiple different things and I tried all of them with no luck. What I found is that it was hit or miss. I would open an app and it worked, an hour later it wouldn’t work. I believe that all those people that were resetting and trying multiple things just happened to hit a time when it was working. Good news is that with Beta 2 it looks like it’s resolved.