Hi Alissa,
Sorry you're running into this bug, and I know it has to be frustrating for you and your clients.
I think the problem you're seeing here is a bit different than what we've discussed earlier in this thread. From the looks of your screenshots, it appears the issue you're seeing is with the slide background.
I recently helped another community member with the same problem to work around this bug by adding the background image to the slide master. Perhaps that will work in your file, too!
I'd be happy to test a few solutions for you, if you don't mind sharing a sample of your file with me. You can attach it directly to a new thread comment.