Design Bug: Wallpaper'd Widget Placed Next to Featured Content Widget Displays White Space

I've placed a Tagged Content widget next to a Featured Content widget on a test homepage, and set the design of the Tagged Content widget to 'Wallpaper'.

The result is what you see below:

There is an ugly white gap at the bottom of the Tagged Content widget (titled 'Spotlight', on the left there). It's likely because there is a 'View All' drawer underneath the Featured Content widget and it's staying in alignment with that. But it would be good if there was a way to stretch the height of the Wallpaper'd Tagged Content entry so it uses up all of the space within the widget container, while still keeping the View All button underneath the Featured Content widget where it is in its own container.

I tried using custom CSS to do this myself but I can't quite seem to figure it out (adding "height: 100%" on or around image container doesn't seem to do anything)...