Nullable array with `$ref` is generated as `any[] | null`

[clemeth]

I have an object with the following (non-required) property defined in the schema (OpenAPI 3.1.0):

"foos": {
  "type": ["array", "null"],
  "items": {
    "$ref": "#/components/schemas/Foo"
  }
}

On 13.0.22, this generates: foos?: any[] | null

I would instead expect: foos?: Foo[] | null

The same thing happens if the property is required, as well. If I make it non-nullable, it works as expected.