[iOS] universal link and appUrlOpen failed at second time

I have configured my App with universal link, and also setup the App listener for “appUrlOpen” event. I could launch the App to the certain page correctly when I open it first time. Then I navigate to other pages, switch the App to the background mode, then click the link again from somewhere else (the link is exactly the one I launch the App successfully just a moment ago), this time nothing happened. It seems the 'appUrlOpen" event is not triggered.

Is it a bug? or I missed something?