We can't get the background images to show in the course on either Pages, Page Headers, Articles or Blocks, when we use adapt-contrib-vanilla 6.0.0. We are just adding the images through the AT in the Theme settings for pages, articles and blocks, but the images doesn't show when we preview the course. We set images in both _large, _medium and _small, and the images are .jpg-files, and it works fine if we use an older version of the theme.
Adapt framework: 5.18.1
AT version: 0.10.5