My page works fine on chrome/FF:
https://foo.netlify.app/.netlify/images?w=2560&fm=webp&url=%2Fimg%2Fcategories%2FPants.jpg
but on safari tries to load
https://foo.netlify.app/.netlify/images?w=2560&fm=jpeg&url=%2Fimg%2Fcategories%2FPants.jpg
Turns out, jpeg is not one of the supported options of Netflify Image CDN