Reference from external reference is broken

[justnero]

When I'm trying to use a reference like

$ref: "https://rebilly.github.io/api-standards/schema/json-schema-draft-04/problem-details/documented-problem.json"

Which contains another

{
    "$ref": "blank-problem.json"
}

The blank-problem.json reference should resolve to https://rebilly.github.io/api-standards/schema/json-schema-draft-04/problem-details/blank-problem.json, but it fails to resolve.
According to debugger XRH is sent with blank-problem.json as url