Incomplete core configuration. Auto detected latitude: , longitude: , name: , elevation:

Configuration:

homeassistant:
  name: Home
  unit_system: metric
  time_zone: x/y

zone:
  - name: Home
    latitude: a
    longitude: b
    elevation: c
    radius: d

Error
Incomplete core configuration. Auto detected latitude: e, longitude: f, elevation: g

(Real values replaced with [a-z])

Why the error?
The Home zone should be indication enough.
In map it shows the right zone and location settings.

Bug?