In my character's setup in Spine Editor, I flipped (-1.0 X-Scale ) her right "eyelid closed" image to make the left one from the same image. Animations using this technique play fine in Spine editor, but in Unity runtime the right image shows, but the flipped left image doesn’t show whenever the character blinks. I also checked and confirmed this is happening with any image that is flipped in the same attachment slot, as I also do this for the hands.
This is annoying because I reuse the same image for the characters hands and feet and simply flip the appropriate ones for the other arm or leg. I thought this would allow me to avoid having the same image twice in the texture atlas.
This seems like a bug as it shows correctly in the editor but not runtime. Any suggestions besides doubling the amount of images in the texture atlas?