$ref from JSON is not recognized and replaced by any

In my yaml I have references to json models in the local files, like this

` schemas:
details:
$ref: 'models/details.json'
`

When I generate TS, I am gettin the property type as "any". No errors are shown. Just a missing type in a result.

When I describe details as Yaml in this file, then everything works as expected, and generator creates an interface. So it's something about the external JSON models that is not working. However the same setup works with another TS generator, so models themselves are correct.