Geocoded location works, but device tracker is unknown

Configuration
1

Hi
On a dashboard I added two entities: person.marco and sensor.xperia_geocoded_location. The first one does show “Unbekannt”. In the second one I can see my address. And also in the attributes I can see the Location.
In the person I assigned device_tracker.xperia to that person.
Did I made a mistake?
The tracker of my car (device_tracker.cupra_born_tracker) does work, it does show “Zu Hause” (at home).

2

What is the actual value of shell_command?
Is it the only device tracker added to that person?