Component schema not rendering in SwaggerUI when specified using $ref

Q&A (please complete the following information)

• OS: macOS Version 13.3.1 (a) (22E772610a)
• Browser: 42Crunch OpenAPI Editor, SwaggerUI preview
• Version: 4.17.0
• Method of installation: VS Code .dmg > Vs Code Extensions
• Swagger-UI version: "swagger-ui-react": "^4.15.5"
• Swagger/OpenAPI version: 3.0.2

Content & configuration

Example Swagger/OpenAPI definition:

{
    "openapi":"3.0.2",
    "info": {
      "title":"API Title",
      "version":"1.0"
    },
    "servers": [
      {"url":"https://api.server.test/v1"}
    ],
    "components": {
        "schemas": {
            "collectionTemplate": {
                "type": "object",
                "properties": {
                    "type": {
                        "enum": ["collection"]
                    },
                    "items": {
                        "type": "array",
                        "items": {
                            "type": "object"
                        }
                    }
                }
            },
            "timestampTemplate": {
                "type": "object",
                "properties": {
                    "timestamp": {
                        "enum": ["timestamp"]
                    }
                }
            },
            "item1": {
                "allOf": [
                    {
                        "$ref": "#/components/schemas/timestampTemplate"
                    },
                    {
                        "type": "object",
                        "properties": {
                            "item1Prop": {
                                "type": "string"
                            }
                        }
                    }
                ]
            },
            "item2": {
                "type": "object",
                "properties": {
                    "item2Prop": {
                        "enum": ["item2Prop"]
                    },
                    "item1Copy": {
                        "$ref": "#/components/schemas/item1"
                    }
                }
            },
            "item2CollectionNotRendered": {
                "allOf": [
                    {
                        "$ref": "#/components/schemas/collectionTemplate"
                    },
                    {
                        "type": "object",
                        "properties": {
                            "items": {
                                "type": "array",
                                "items": {
                                    "$ref": "#/components/schemas/item2"
                                }
                            }
                        }
                    }
                ]
            },
            "item2CollectionRendered": {
                "allOf": [
                    {
                        "$ref": "#/components/schemas/collectionTemplate"
                    },
                    {
                        "type": "object",
                        "properties": {
                            "items": {
                                "type": "array",
                                "items": {
                                    "type": "object",
                                    "properties": {
                                        "item2Prop": {
                                            "enum": ["item2Prop"]
                                        },
                                        "item1Copy": {
                                            "$ref": "#/components/schemas/item1"
                                        }
                                    }
                                }
                            }
                        }
                    }
                ]
            }
        }
    },
    "paths": {
        "/notrendered": {
            "get": {
                "description": "",
                "parameters": [],
                "responses": {
                    "200": {
                        "description": "OK",
                        "content": {
                            "application/json": {
                                "schema": {
                                    "$ref": "#/components/schemas/item2CollectionNotRendered"
                                }
                            }
                        }
                    }
                }
            }
        },
        "/rendered": {
            "get": {
                "description": "",
                "parameters": [],
                "responses": {
                    "200": {
                        "description": "OK",
                        "content": {
                            "application/json": {
                                "schema": {
                                    "$ref": "#/components/schemas/item2CollectionRendered"
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

Swagger-UI configuration options:

// n/a

Describe the bug you're encountering

One component schema (item2 in example) includes another (item1 in example) as a sub-object in its definition. The item2 schema resolves correctly in the "Schemas" section of the preview, but the reference to item1 defaults to "string" rather than displaying the sub-object in the route response example textbox when added as a $ref. Adding the item2 schema directly rather than referencing it produces the expected result.

To reproduce...

Steps to reproduce the behavior:

1. Go to https://editor.swagger.io
2. Copy the example definition into the editor
3. Compare example text for responses of /notrendered and /rendered
4. Compare schemas for item2Collection* > items > item1Copy of item2CollectionNotRendered and item2CollectionRendered in the Schemas section.

Expected behavior

The response example text for item2CollectionNotRendered and item2CollectionRenderd to match.

Screenshots

Additional context or thoughts

Directed here by extension project: 42Crunch/vscode-openapi#222

Reproduce the supplied OpenAPI definition in editor.swagger.io and compare the /notrendered and /rendered response examples, focusing on item2Collection* > items > item1Copy. Trace the Swagger UI schema-resolution and response-example rendering entry points; done means both response examples render the referenced item1 sub-object consistently.