Thanks Genesislozenge. I dropped those assets into a default Sidescroller 2D template project. references were broken, so I’m guessing folder structure is different in your project. I remade flipbook using textures you included, and was not able to reproduce issue when I used flipbook in MyCharacter blueprint.
Have you tried making a new flipbook using same assets? Or recreating Sprites and making a new Flipbook from them? If that doesn’t work, I may need to see your project to narrow down cause. If you can upload it somewhere and get me a link to download it, I can look into it further. You can send me link privately via forums, if you’d prefer.