ConcurrentModificationException in 1.1 when running multiple library instances

[paddybyers]

From customer:

java.lang.RuntimeException: Error receiving broadcast Intent { act=android.net.conn.CONNECTIVITY_CHANGE flg=0x4000010 (has extras) } in io.ably.lib.platform.AndroidNetworkConnectivity$NetworkStateReceiver@5dc0615
at android.app.LoadedApk$ReceiverDispatcher$Args.lambda$-android_app_LoadedApk$ReceiverDispatcher$Args_53442(LoadedApk.java:1367)
at android.app.-$Lambda$FilBqgnXJrN9Mgyks1XHeAxzSTk.$m$0(Unknown Source:4)
at android.app.-$Lambda$FilBqgnXJrN9Mgyks1XHeAxzSTk.run(Unknown Source:0)
at android.os.Handler.handleCallback(Handler.java:789)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:180)
at android.app.ActivityThread.main(ActivityThread.java:6950)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:835)
Caused by: java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1441)
at java.util.HashMap$KeyIterator.next(HashMap.java:1465)
at io.ably.lib.transport.NetworkConnectivity.notifyNetworkAvailable(NetworkConnectivity.java:31)
at io.ably.lib.transport.NetworkConnectivity$DelegatedNetworkConnectivity.onNetworkAvailable(NetworkConnectivity.java:57)
at io.ably.lib.transport.NetworkConnectivity.notifyNetworkAvailable(NetworkConnectivity.java:32)
at io.ably.lib.platform.AndroidNetworkConnectivity.access$000(AndroidNetworkConnectivity.java:14)
at io.ably.lib.platform.AndroidNetworkConnectivity$NetworkStateReceiver.onReceive(AndroidNetworkConnectivity.java:66)
at android.app.LoadedApk$ReceiverDispatcher$Args.lambda$-android_app_LoadedApk$ReceiverDispatcher$Args_53442(LoadedApk.java:1348)
at android.app.-$Lambda$FilBqgnXJrN9Mgyks1XHeAxzSTk.$m$0(Unknown Source:4) 
at android.app.-$Lambda$FilBqgnXJrN9Mgyks1XHeAxzSTk.run(Unknown Source:0) 
at android.os.Handler.handleCallback(Handler.java:789) 
at android.os.Handler.dispatchMessage(Handler.java:98) 
at android.os.Looper.loop(Looper.java:180) 
at android.app.ActivityThread.main(ActivityThread.java:6950) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:835)