[bluerobotcat]

The app doesn't get killed that quickly because it has location services on in the background. It's the same reason that Google Maps doesn't get killed in the background when it's giving you directions. iOS prompts for permission, but the authorities gave us instructions to grant such permissions.

That being said, it is thee case that if you open sufficient apps (especially memory hungry ones) the app will be killed regardless.

I've resigned to manually bringing the app to the foreground every now and then in an attempt to reduce the number of phone calls I get from the government to a minimum (currently 1-2 per day).