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via GitHub by hansvdam
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This exception has no message.
java.util.ConcurrentModificationException: 	at java.util.ArrayList$ArrayListIterator.next(ArrayList.java:573)	at com.kontakt.sdk.android.ble.discovery.AbstractBluetoothDeviceDiscoverer.evictInactiveDevices(Unknown Source)	at com.kontakt.sdk.android.ble.service.DefaultBluetoothDeviceDiscoverer.evictInactiveDevices(Unknown Source)	at com.kontakt.sdk.android.ble.service.MonitorCallback.evictInactiveDevices(Unknown Source)	at com.kontakt.sdk.android.ble.service.MonitorCallback$1.run(Unknown Source)	at android.os.Handler.handleCallback(Handler.java:733)	at android.os.Handler.dispatchMessage(Handler.java:95)	at android.os.Looper.loop(Looper.java:136)	at android.app.ActivityThread.main(ActivityThread.java:5586)	at java.lang.reflect.Method.invokeNative(Native Method)	at java.lang.reflect.Method.invoke(Method.java:515)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)