Drag and Drop wont work when previewing entire course

Hi all. Made a drag and drop activity where I need a new layer to appear once the user has dragged the correct options onto a list. The activity has 3 parts so I've just copied the first and changed the text around for the 2nd.

The first works perfectly. The second will only work when I view the slide on its own, nothing happens when viewing the entire course. Thanks!

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