Topics page infinite scroll broken on large vertical monitors

I have a 1080p monitor set up vertically (portrait) instead of horizontal (landscape). When I view the "Topics" page, it shows me the first 15-20 topics and stops. On a landscape monitor, I could then scroll down and more topics would auto-populate (to a certain limit before a "show more" button appears).

On the vertical monitor, I can't scroll down since the entire page fits onto my monitor, thus I can never activate the auto-population scrolling function to see the rest of the topics.