Always Home after turning off GPS on smartphone

Hey! I have a little problem here with HA.

I can see my smartphone on the entities list (I have the HA Mobile App installed in my smartphone). When I am at home it gets the location through GPS and shows the device status as “Home”, lust fine!

But if I turn the GPS off and leave my home zone the status remains “Home”, which is understandable because it sticks to the last location update.

BUT I want it to show “Unknown” instead of “Home” if it doesn’t get a location update from the device for 15 minutes. Is it possible? I’ve researched much to no avail.