localPersistenceManager returns a null location

[aminisana]

I dispalyed the localPersistenceManager and it's return a null location like this:
{ _devices:
[ { name: 'Nexus_5X_API_28',
location: { latitude: 0, longitude: 0, altitude: 0 },
deviceType: 'MobileDevice',
id: '20f4a1d9-6c55-49d2-aa7c-5278eec6ccc6',
createdAt: 1555321201061,
platform: 'android',
deviceToken: 'Nexus_5X_API_28_device_token_test_sana_must_be_unique' } ],
_publications: [],
_subscriptions: [],
_defaultDevice:
{ name: 'Nexus_5X_API_28',
location: { latitude: 0, longitude: 0, altitude: 0 },
deviceType: 'MobileDevice',
id: '20f4a1d9-6c55-49d2-aa7c-5278eec6ccc6',
createdAt: 1555321201061,
platform: 'android',
deviceToken: 'Nexus_5X_API_28_device_token_test_sana_must_be_unique' } }

How can I fix this please?
Thank you