QtNetworkReceiver wont be unregistered in AndroidConnectivityManager

Recently i faced a bug with qtnetworkconfiguration, i used it in qt android service, when the service destroyed, android warns about unregistered receivers, here is example output

E/ActivityThread(10875): Service edu.sharif.iiscenter.khasis.KhasisService has leaked IntentReceiver org.qtproject.qt5.android.bearer.QtNetworkReceiver$BroadcastReceiverPrivate@228f85bd that was originally registered here. Are you missing a call to unregisterReceiver()?
E/ActivityThread(10875): android.app.IntentReceiverLeaked: Service edu.sharif.iiscenter.khasis.KhasisService has leaked IntentReceiver org.qtproject.qt5.android.bearer.QtNetworkReceiver$BroadcastReceiverPrivate@228f85bd that was originally registered here. Are you missing a call to unregisterReceiver()?
E/ActivityThread(10875):     at android.app.LoadedApk$ReceiverDispatcher.<init>(LoadedApk.java:901)
E/ActivityThread(10875):     at android.app.LoadedApk.getReceiverDispatcher(LoadedApk.java:702)
E/ActivityThread(10875):     at android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:1701)
E/ActivityThread(10875):     at android.app.ContextImpl.registerReceiver(ContextImpl.java:1681)
E/ActivityThread(10875):     at android.app.ContextImpl.registerReceiver(ContextImpl.java:1675)
E/ActivityThread(10875):     at android.content.ContextWrapper.registerReceiver(ContextWrapper.java:495)
E/ActivityThread(10875):     at org.qtproject.qt5.android.bearer.QtNetworkReceiver.registerReceiver(QtNetworkReceiver.java:73)

I looked at the code (dev branch) and found AndroidConnectivityManager instance never deconstructed in android's QNetworkConfigurationm_connectivityManager (https://github.com/RSATom/Qt/blob/master/qtbase/src/plugins/bearer/android/src/qandroidbearerengine.cpp) and thus the unregisterReceiver method of AndroidConnectivityManager never be called.

AndroidConnectivityManager will be used as singleton instance in  QAndroidBearerEngine::initialize() but no one deconstruct it, thus when the application is killed the broadcast receiver unregistration never called.

ex: i looked at the git, it seems this bug present from Qt 5.5.1