Documentation node does not reliably display images

Images are not reliably being shown in the documentation node. As an example the path Shared\GraphNodes\AnimationStateMachine with the drop down UAnimSlateNode does not show any images.

1. Open level blueprint
2. Create a Documentation node (Right click > Search Documentation > Add Documentation Node)
3. Paste the following in the link field for the documentation node "Shared\GraphNodes\AnimationStateMachine"
4. Select UAnimStateNode from the Excerpt drop down

Result: The documentation node does not display any images
Expected: The Documentation node would display the images used in the documentation