Deeplinking parameters causing confusion in App

[theisogunro]

I have a SharePoint list being rendered through a PowerApp dataTable onto the page(shows a list of sharepoint items).  One of the columns is a link that takes the user to a pop-up showing the details of the single item that was selected, so updates can be made.

When I provide a link to the specific item using DeepLinking (https://play.apps.appsplatform.us/play/xxx83938?tenanteid=03923&requestID=59), I am successfully taken to that specific item.  Here's the issue I am facing, when I navigate away from the item back to the PowerApps page with the list of items and click on a different link, it still shows the item from the deeplinking.  I believe it's because the url doesn't change and my app is still referencing the item with reqeustID=59 which is in the URL.

How can I fix this?

Here's what I have on the App OnStart

Set(firstRun,true);
If(
    Value(Param("requestID")) <> 0,
    Set(
        itemID,
        LookUp('Registration', ID=Value(Param("requestID"))
     )
   );
   Set(firstRun,false);
   Navigate(EditScreen)
)

[theisogunro]

Yes, that's correct.  I want the app to use SelectedItem instead of the itemID

If(Value(Param("requestID")) <> 0, itemID, SelectedItem)

I will try your suggestion of adding the set when navigating away