Mobile app integration person/phone "unknown"

I added my phone to the mobile app integration.
A lot of of sensors/entities are displaying values and even my location display the correct values. I added this phone to “person”
The entity with the “name” of my phone is displayed as “unknown” so it is “unknown” whether i am in the house or not.
I do not understand why de status of just this entity is unknown while others are giving correct values.
In my phone settings I have home assistant allowed access to my location