Listview row is disabled after navigate back

Hi,

I use a navigation page with a listview. When a user tabs on a cell, it navigates to another page (using await this.Navigation.PushAsync(). On this detail page, there is a default back button on the header which the user can use to navigate back. When I go back to the main page, I notice the row it returns to is disabled. Users are forced to select another row on the main page. and cannot select a particular row repeatedly. I looked at a few sample codes and they are the same behaviour.

Am I missing something?

thx,
Joseph