Caused by java.lang.NullPointerException Attempt to invoke virtual method 'int java.lang.Object.hashCode()' on a null object reference com.amazonaws.mobileconnectors.appsync.WebSocketConnectionManager.releaseSubscription

Caused by java.lang.NullPointerException Attempt to invoke virtual method 'int java.lang.Object.hashCode()' on a null object reference com.amazonaws.mobileconnectors.appsync.WebSocketConnectionManager.releaseSubscription #86