Internal reference of external referenced schema not working #1094

I have a schema 1.json that externally references 2.json.

It works but 2.json has an internal reference, this doesn't work unless I use the external reference syntax to 2.json (within 2.json).

I am using 4.17.3 (from openapi core).

Any known workaround to make jsonschema find internal references from both schemas?