Problem with certain images URL

My backend is returning an image URL like this:
//cdn.shopify.com/s/files/1/0344/4398/5031/products/Sriracha_Front_f87e91cf-85da-44d1-8716-bb0246c2b6e1_grande.png?v=1583745215
on Android and web it works fine. But on iOS the img tag doesn’t resolve the image.

Do you know a way to fix this error?