External $ref resolution breaks when the base spec is loaded over HTTP

External $ref resolution breaks when the base spec is loaded over HTTP: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). I'm using kin-openapi to load an OpenAPI 3 spec that's hosted on an HTTP server. The spec is split across multiple files — the root document…