Text Formatting Changes in Scrolling Panel Not Showing Up In Preview

My bad. As I was preparing the file to submit it formally in a support case, I realized there were multiple states for the feedback panels and I only changed the Normal state. When the preview runs, the Normal state is never shown because the feedback panel only becomes visible in response to the learner submitting an answer which is either Correct or Incorrect and consequently those are the only two states that ever get displayed. But since I didn't change the italicization on either of those states, it looked like Storyline wasn't properly displaying my changes. 

Now that I have edited the Correct and Incorrect states of that feedback panel, the slide previews correctly.

Sorry for the confusion!