Using @JsonUnwrapped with @Schema(implementation = Something) does not unwrap

Hi, I have an object like

public record Car(String model, @JsonUnwrapped @Schema(implementation=ResourcePath.class) Resource resource, boolean selected) {
}

public abstract class Resource {
}

public abstract class ResourcePath extend Resource {

  public String resourcePath;
  
  public String resourceType;

}

Resource is an abstract class, and does not contain all the fields present in ResourcePath. However, Jackson picks up all the fields and still unwrap them with @JsonUnwrapped.

The moment I specify an implementation in @Schema, resource stop being unwrapped in the openapi.yaml.

Expected

 Car:
  type: object
  properties:
    model:
      type: string
    resourceType:
      type: string
    resourcePath:
      type: string
    selected:
      type: boolean

Result

ResourcePath:
  type: object
  properties:
    resourceType:
      type: string
    resourcePath:
      type: string
      
Car:
  type: object
  properties:
    model:
      type: string
    resource:
      $ref: "#/components/schemas/ResourcePath"
    selected:
      type: boolean

Start by reproducing the Java record example with @JsonUnwrapped and @Schema(implementation = ResourcePath.class), then inspect the generated openapi.yaml. Compare schema generation with and without implementation and verify that the completed result inlines resourceType and resourcePath under Car instead of emitting a resource $ref.