Bluetooth Low Energy scan failed with error code: 4

Prerequisites

[ X] Put an X between the brackets on this line if you have done all of the following:
- My beacons have Estimote Monitoring enabled (Check it in the Estimote Cloud, or via app)
- My Android device/devices supports BLE and has Android OS version >= 5.0.0
- My Android device/devices have bluetooth enabled
- My app has Location Permissions granted

Basic information

Estimote SDK version: [0.4.1 mustard:0.2.1]

Android devices affected: [Samsung Galaxy J1 Ace, Motorola G5 Play]

Android OS version affected: [Android Lollipop 5.1.1 Api 22, Android Marshmellow 6.0.1]

Beacon hardware version: [F3.3 / Estimote OS 4.13.2]

Description

[When our app start and begans to scan for beacons it crash, see below for log details, if need we have crashlytics info ]

(Optional) Steps to reproduce:

[staring the app]

Expected behavior: [start searching for beacons, zone event should be fired upon a beacon detection, no to crash the app]

Actual behavior: [crash]

Additional information

Might be the same case as issue #37 or at least related

Caused by java.lang.Exception
Bluetooth Low Energy scan failed with error code: 2
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com.estimote.scanning_plugin.packet_provider.scanner.PostLollipopEstimoteScanner$scan$1$callback$1.onScanFailed (PostLollipopEstimoteScanner.kt:30)
android.bluetooth.le.BluetoothLeScanner$1.run (BluetoothLeScanner.java:416)
android.os.Handler.handleCallback (Handler.java:746)
android.os.Handler.dispatchMessage (Handler.java:95)
android.os.Looper.loop (Looper.java:148)
android.app.ActivityThread.main (ActivityThread.java:5459)
java.lang.reflect.Method.invoke (Method.java)
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:728)
com.android.internal.os.ZygoteInit.main (ZygoteInit.java:618)

Fatal Exception: io.b.c.f
java.lang.Exception: Bluetooth Low Energy scan failed with error code: 2
io.reactivex.plugins.RxJavaPlugins.onError (RxJavaPlugins.java:349)
io.reactivex.internal.operators.observable.ObservableFlatMap$InnerObserver.onError (ObservableFlatMap.java:573)
io.reactivex.internal.observers.BasicFuseableObserver.onError (BasicFuseableObserver.java:100)
io.reactivex.observers.SerializedObserver.onError (SerializedObserver.java:155)
io.reactivex.internal.operators.observable.ObservableDebounceTimed$DebounceTimedObserver.onError (ObservableDebounceTimed.java:104)
io.reactivex.internal.operators.observable.ObservableRefCount$ConnectionObserver.onError (ObservableRefCount.java:134)
io.reactivex.internal.operators.observable.ObservablePublish$PublishObserver.onError (ObservablePublish.java:184)
io.reactivex.internal.observers.BasicFuseableObserver.onError (BasicFuseableObserver.java:100)
io.reactivex.internal.observers.BasicFuseableObserver.onError (BasicFuseableObserver.java:100)
io.reactivex.internal.operators.observable.ObservableRefCount$ConnectionObserver.onError (ObservableRefCount.java:134)
io.reactivex.internal.operators.observable.ObservablePublish$PublishObserver.onError (ObservablePublish.java:184)
io.reactivex.internal.operators.observable.ObservableCreate$CreateEmitter.tryOnError (ObservableCreate.java:85)
io.reactivex.internal.operators.observable.ObservableCreate$CreateEmitter.onError (ObservableCreate.java:73)
com.estimote.proximity_sdk.monitoring.estimote_monitoring.SimpleEstimoteMonitor$startEstimoteLocationScan$1$2.invoke (SimpleEstimoteMonitor.kt:44)
com.estimote.proximity_sdk.monitoring.estimote_monitoring.SimpleEstimoteMonitor$startEstimoteLocationScan$1$2.invoke (SimpleEstimoteMonitor.kt:16)
com.estimote.scanning_plugin.api.use_cases.ScanUseCase$notifyUserCallbacks$2.accept (ScanUseCase.kt:28)
com.estimote.scanning_plugin.api.use_cases.ScanUseCase$notifyUserCallbacks$2.accept (ScanUseCase.kt:8)
io.reactivex.internal.observers.LambdaObserver.onError (LambdaObserver.java:77)
io.reactivex.internal.operators.observable.ObservableFlatMap$MergeObserver.checkTerminate (ObservableFlatMap.java:495)
io.reactivex.internal.operators.observable.ObservableFlatMap$MergeObserver.drainLoop (ObservableFlatMap.java:331)
io.reactivex.internal.operators.observable.ObservableFlatMap$MergeObserver.drain (ObservableFlatMap.java:323)
io.reactivex.internal.operators.observable.ObservableFlatMap$InnerObserver.onError (ObservableFlatMap.java:571)
io.reactivex.internal.observers.BasicFuseableObserver.onError (BasicFuseableObserver.java:100)
io.reactivex.internal.observers.BasicFuseableObserver.onError (BasicFuseableObserver.java:100)
io.reactivex.internal.observers.BasicFuseableObserver.onError (BasicFuseableObserver.java:100)
io.reactivex.internal.observers.BasicFuseableObserver.onError (BasicFuseableObserver.java:100)
io.reactivex.internal.operators.observable.ObservableCreate$CreateEmitter.tryOnError (ObservableCreate.java:85)
io.reactivex.internal.operators.observable.ObservableCreate$CreateEmitter.onError (ObservableCreate.java:73)
com.estimote.scanning_plugin.packet_provider.scanner.PostLollipopEstimoteScanner$scan$1$callback$1.onScanFailed (PostLollipopEstimoteScanner.kt:30)
android.bluetooth.le.BluetoothLeScanner$1.run (BluetoothLeScanner.java:416)

Estimote / Android-Proximity-SDK