Kotlin-BLE-Library scanner does not find my device

[Frank HJ Cuypers]

I am trying to use the BLE Scanner from Kotlin-BLE-Library release 1.1.0, wthout any filtering.
The scanner does return several bonded and unbonded devices, so it seems to work.
But it does NOT return the BLE device that I am interested in.
Also when I run the UIScanner app included in Kotlin-BLE-Library, it does find several of my BLE devices, but not the device I am looking for.

However, when I use for example the LightBlue BLE scanner, it does return the device that I am looking for.

Any idea why the Kotlin-BLE-Library does not find this device?

[Frank HJ Cuypers]

nRF Connect for Mobile also finds the device.

[Frank HJ Cuypers]

I found the answer. My device presents itself as a beacon. But I declared the permission android.permission.BLUETOOTH_SCAN with android:usesPermissionFlags="neverForLocation" in the AndroidManifest.xml; so the beacons where not included.