Yes, but if iam correct you don’t need to add the “http:” prefix as the imgix url already contains it (also https is better).
After the " :processed with imgix", check if you can add " ‘s URL" if this still not work. I can’ t use my laptop right now, but I’m pretty sure it will work.
Can you try to get the field’s value displayed somewhere in a text component, the same way it is set here. So that we will be able to see what the url looks for, and adapt if needed. A blank space could be the reason