Background images do not load after recent Upfront update; resolves upon using editmode

Hello,

After this recent update, it seems that most of my pages that use background images are not loading their image. This resolves upon visiting the page in Upfront and investigating the background settings.

You can see an example here: https://betterbetterbetter.org/about

The problem is that I have many sites using Upfront. I am not eager to spend the next three hours clicking and waiting, though I will need to if this is not resolved in the next day. I have already tried resetting the Upfront cache with no avail. I have loaded the unminified site (using Hummingbird) without effect.

Thank you for your investigation,
Jeremy