Broken area banner workarounds?

New user here, hello!

I was playing around with custom area banners and happened to stumble upon this bug. Whenever I travel to a new area with a custom banner image, the site tries to load the image from SN’s own banner library (// thus breaking the image link. Image loads correctly when the page is refreshed.

I searched around the forum and someone with similar problem pointed out it might be possible to avoid the broken links by providing every external image with separate CSS rule, but I’m afraid I don’t quite understand how to do this.

Any suggestions and ideas for possible workarounds are greatly appreciated. I was hoping I could use the area banners as custom backgrounds for different areas, but this bug is making area transitions mighty disorienting.
edited by sen on 11/14/2015