I have a Portfolio collection with a storymap embeded. In the storymap (viewed in the portfolio), there are images that do not appear. They look just fine while editing, but once viewed after publishing, I try to view the storymap in my portfolio and the image shows up as grey/invisible. They have been visible in the past. These images were uploaded from my computer. There are other images from my computer in the same storymap that show up.
Portfolio link: https://arcg.is/SX4Xn
The specific problem is in the 2nd tab, the GEO 223 project, the images under the "Background" tab at the beginning. The images are jpg and png. Lastly, the images work fine when viewing the story map outside of the portfolio.
Attached is how it shows up in edit mode, and how it shows up after publishing.