Xamarin forms Navigation issue. Popped page stays active
<p>I have a page "PageA" which listens to a Changed event on a global object.
The page is added in the navigation stack like this:
<code>await Navigation.PushAsync(new PageA());</code>
The page is removed by clicking the back button in the navigation bar.
When I do the same x times, I have x times PageA instances listening to the Changed event. So PageA is created over and over again, but is never really removed.
How do I really get rid of the PageA when clicking the back button?</p>