[BUG] [JAVA] Discriminator does not map objects that are inherited from the super class

Bug Report Checklist

used library: openapi-generator-cli-7.4.0

Description

I use annotations in a Spring application that are used to parameterize the objects used.
I have an abstract super class from which other objects inherit. I would like the response from the method generated using the generator to be of the appropriate type based on the defined parameter type.

@JsonTypeInfo(use = JsonTypeInfo.Id.MINIMAL_CLASS, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "childType")
@JsonAutoDetect(fieldVisibility = JsonAutoDetect.Visibility.ANY)
@Schema(
        discriminatorMapping = {
                @DiscriminatorMapping(value = "com.example.FirstChild", schema = FirstChild.class),
                @DiscriminatorMapping(value = "com.example.SecondChild", schema = SecondChild.class),,
                @DiscriminatorMapping(value = "com.example.ThirdChild", schema = ThirdChild.class)},
        discriminatorProperty = "childType",
        requiredProperties = {"childType"}
)
public abstract class ParentClass implements Serializable {
  private String childType;
  
  // getter, setter, constructor...
}

Here are some sample json file fragments which has been generated by swagger:

      "ParentClass": {
        "required": [
          "childType"
        ],
        "type": "object",
        "properties": {
          "childType": {
            "type": "string"
          }
        },
        "discriminator": {
          "propertyName": "childType",
          "mapping": {
            "com.example.FirstChild": "#/components/schemas/FirstChild",
            "com.example.SecondChild": "#/components/schemas/SecondChild",
            "com.example.ThirdChild": "#/components/schemas/ThirdChild"
          }
        }
      }

      "SecondChild": {
        "type": "object",
        "allOf": [
          {
            "$ref": "#/components/schemas/ParentClass"
          },
          {
            "type": "object",
            "properties": {
              "childType": {
                "type": "string"
              },
              "currency": {
                "type": "string"
              },
              "name": {
                "type": "string"
              },
              "mrk": {
                "type": "string"
              }
            }
          }
        ]
      }

Endpoint from spring controller

    "/endpoint/test": {
      "get": {
        "description": "test description",
        "operationId": "testId",
        "parameters": [],
        "responses": {
          "200": {
            "description": "OK",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ParentClass"
                }
             }
          }
       }

Shouldn't this json file also contain the following fragment:
"type": "array" under "schema" ?

After running the method written in Python, instead of the response in json format, I get the following information:

[
InsertParentClassRequest(
   oneof_schema_1_validator=None, 
   oneof_schema_2_validator=None, 
   oneof_schema_3_validator=None, 
   actual_instance=SecondChild(childType='com.example.SecondChild', currency='USD', name='RATE', mrk='9M'), 
   one_of_schemas=typing.Literal['FirstChild', 'SecondChild', 'ThirdChild'], discriminator_value_class_map={}),
InsertParentClassRequest(
   oneof_schema_1_validator=None, 
   oneof_schema_2_validator=None, 
   oneof_schema_3_validator=None, 
   actual_instance=SecondChild(childType='com.example.SecondChild', currency='PLN', name='XXX', mrk='2M'), 
   one_of_schemas=typing.Literal['FirstChild', 'SecondChild', 'ThirdChild'], discriminator_value_class_map={})
]

The python code generates without errors and the vast majority of classes work flawlessly. However, we have a problem with class inheritance. I have already tried many ways, but nothing brought the expected result.
Do you have any idea what's wrong?

No source files or tests are named. Start by reproducing the OpenAPI schema from the ParentClass and SecondChild examples with openapi-generator-cli 7.4.0, then inspect the generated Python models and endpoint response handling; done means inherited discriminator values map to the appropriate child class and the expected response shape is established.