Currently, if you apply an Effect to a ListBox Element, any previously-functioning Interactivity becomes no longer functional.

See attached video.

Repro Steps:

1) Download, unzip, and open the attached Studio Project.

2) With the MainPage.xaml open, press Play, and hover over the Fast Food Item tiles on the left of the screen.
Observe how on hover, they are given a 'hover' effect.

3) Exit Play Mode, and select the ListBox Element on the left of the screen.

4) Give the ListBox any 'Effect' (DropShadow is a great candidate as the Element itself remains crisp and visible)

5) Press 'Play' again, and once again, mouse over the Fast Food Item tiles on the left of the screen.

Observe how the Fast Food Items hover states no longer function.

Expected Results: Applying an Effect to a Collection Element does not disabled its Interactivity.