webp images not working randomly

Hello,

I’m a smush pro subscriber. Webp is working on most pages but some images it fails to work on.

https://ibb.co/w716041

I’ve tried deleting all 25k webp images in smush and regenerated them all.

I disabled all other extensions aside from the cache program, so it’s not a plugin conflict and webp works 99% of the images.

But randomly images here and there among all our blogs fail to work. What’s causing this and how do I fix it?

The page I need help with: [log in to see the link]