Clear RctManager when ReactInstanceManager is destroyed

android/app/src/main/java/com/reactnativenavigation/activities/BaseReactActivity.java

         if (mReactInstanceManager != null && (activity == null || activity.isFinishing())) {
             Log.i(TAG, "Destroying ReactInstanceManager");
             mReactInstanceManager.onHostDestroy();
+            RctManager.getInstance().onDestroy();
         } else {
             Log.d(TAG, "Not destroying ReactInstanceManager");
         }

android/app/src/main/java/com/reactnativenavigation/core/RctManager.java

 
         return currentReactContext.getJSModule(RCTDeviceEventEmitter.class);
     }
+
+    public void onDestroy() {
+        mReactManager = null;
+        sInstance = null;
+    }
 }