Scanning stops when lock screen. Starts when opening

[devoatle]

When running app, its looks good and scanning.
Pushing lock-screen it stops scanning. (Not killing the App)

Open App:
[log] {"region":{"identifier":""},"beacons":[{"proximityUUID":"E2C56DB5-DFFB-48D2-B060-D0F5A71096E3","major":0,"minor":0,"rssi":-71,"accuracy":1.68,"proximity":"near","txPower":-59,"macAddress":"AC:23:3F:A9:21:7B"}

Lock Screen:
[log] {"region":{"identifier":""},"beacons":[]}

It must work in lock-screen for my usage.
Any idea?

[mdxs]

This is not a https://github.com/AltBeacon/spec specification question, please ask in the appropriate software oriented project.