Datacontext becomes null when I use containercontentchanging

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C#

DataContext

UWP

I have a GridView which display an image in a Grid. This App is based on PhotoLab Sample.

ImageGridView_ContainerContentChanging is called when GridWiew is populated.
When it's done, I would like to use RightTapped on the grid (which contains an image) to do an action that needs to know the item

I can get the Item as discribed on Grid_RightTapped event if I disable ImageGridView_ContainerContentChanging, but of course the image is not displayed.

The issue is when I use ContainerContentChanging the DataContext becomes null !

private void Grid_RightTapped(object sender, RightTappedRoutedEventArgs e)
        {
            Item item = ((FrameworkElement)e.OriginalSource).DataContext as Item;
            Debug.WriteLine($"ItemDescription: {item.ItemDescription}");
            mListView.SelectedItem = item;
        }

private void ImageGridView_ContainerContentChanging(ListViewBase sender, ContainerContentChangingEventArgs args)
        {
            if (args.InRecycleQueue)
            {
                Grid templateRoot = args.ItemContainer.ContentTemplateRoot as Grid;
                Image image = (Image)templateRoot.FindName("VignetteImage");

                image.Source = null;
            }

            if (args.Phase == 0)
            {
                args.RegisterUpdateCallback(ShowImage);
                args.Handled = true;
            }
        }

private async void ShowImage(ListViewBase sender, ContainerContentChangingEventArgs args)
{
    vGlobale.isLoadingPicture = true;
    if (args.Phase == 1)
    {
        // It's phase 1, so show this item's image.
        Grid templateRoot = args.ItemContainer.ContentTemplateRoot as Grid;

        Image image = (Image)templateRoot.FindName("VignetteImage");
        image.Opacity = 100;
        ImageFileInfo item = args.Item as ImageFileInfo;
        //Debug.WriteLine($"item : {item.ImageName}");

        try
        {
            BitmapImage itemTemp = await item.GetImageSourceAsync(540);
            Debug.WriteLine($"PixelWidth {itemTemp.PixelWidth}");

            if (itemTemp.PixelWidth == 0)
            {
                //Debug.WriteLine($"GetImageThumbnailAsync");
                image.Source = await item.GetImageThumbnailAsync();
            }
            else
            {
                //Debug.WriteLine($"GetImageSourceAsync");
                image.Source = itemTemp;
            }
        }
        //catch (IOException e)
        catch (Exception )
        {
            //Debug.WriteLine($"exeption {e}");
            BitmapImage bitmapImage = new BitmapImage();
            bitmapImage.UriSource = new Uri(image.BaseUri, "/Assets/ImageInconnue.png");
            image.Source = bitmapImage;
        }
    }
    vGlobale.isLoadingPicture = false;
}

What I have tried:

Everything works separately but both together not.
Need help to find a solution to get the Item in RightTapped event (perhaps without DataContext)