'Resize to Fit Available Space' Option Not Working

Hello!

I’m trying to get a webcomic to load onto a separate page, but when I click for the webcomic to be fit into the content area, the comic doesn’t show at all, despite having ‘resize to fit available space’ selected.

Otherwise, it pushes the widgets down below, which I’m sure is what’s expected for this, of course.

You can see what I’m running into with it here:
http://www.strangenunusual.com/vhs/

https://wordpress.org/plugins/webcomic/