Our environment is AWS ELB SSL Terminating (https://foo.bar) -> Varnish (http://10.0.0.1) -> Symfony (http://10.0.0.2)

With the new Fragments, the ESI are being generated as a URI (e.g. https://foo.bar/esi) and not a relative path (/esi), which will not work for our architecture, as varnish doesn't know it can handle https://foo.bar/esi, and so has to do a loop via the ELB, which then doesn't appear to work...

Solution would be to change it to generate a path rather than uri, or have that ability as an optional param.