At Couple, we found a much simpler solution to debug this exact same bug two days ago, and there was no driving needed:

1. Add lock code to your phone

2. Open the app without a debugger attached and start monitoring for significant location changes

3. Minimize app

4. Turn off iPhone

5. Turn iPhone back on.

Now if you wait 3-5 minutes in the same spot, your app will be woken up and will get a significant location change. Much simpler than driving and easily reproducible in the office.

Now to know when the app actually wakes up while you're in the lock screen, I added a local notification as part of the startup process. Now we just keep the phone locked for a few minutes until it shows the local notification, then you unlock it and see the logout problem.

Hope that helps everyone else!