Images in scrolling panel go invisible

Attached is a slide with multiple layers to mimic a screen with links. Selecting Executive Project Summary,  shows the Project Overview. Using a scrolling panel I added states to each color graphic and multiple images for the user to scroll down. My issue is that although this worked initially, for some reason the 2nd, 3rd, and 4th image are now invisible. This is the second time I've created this layer. If you click Solution Pipeline, and it's still working, you'll see a working example. I've done similar slides in the past with no issue and have no idea why an image would literally go invisible.