After image optimization, I still get insight error

Hello! I purchased WP Smush Pro and I optimized all my images with Super-Smush images and Next gen checked (1.15 gb reduction for 5191 photos, very good :slight_smile: ) but even though I deleted my site cache any my browser cache, I still get the recommendation to optimize my images from google page speed and your performance app. Why is that? I have granted support access