swagger-codegen-cli issue with serializing request parameters

Description

Im using swagger codegen cli to generate a java client from openAPI json. I have a controller method on the server which receives a object as request param (Spring boot version 2.3.3.RELEASE). When running from swagger ui, the object is serialized properly. I'm using org.springdoc:springdoc-openapi-ui:1.6.7 to generate the OAS 3 specs.

However, when making the request from the client, the server can't deserialize the object from the request. It eventually uses a null object for processing.

Swagger-codegen version

Im using org.hidetake.swagger.generator v 2.18.2 along with io.swagger.codegen.v3:swagger-codegen-cli:3.0.34. It is a gradle project.

Swagger declaration file content or url

This is the part of the json which i want to use. This was created by springdoc in the spring boot server.

"/user": {
	"get": {
		"tags": [
			"user-controller"
		],
		"summary": "Get list of all users",
		"description": "some desc",
		"operationId": "getAllUsers",
		"parameters": [
			{
				"name": "filter",
				"in": "query",
				"required": true,
				"schema": {
					"$ref": "#/components/schemas/User_DTO_ShortView"
				}
			}
		],

Start with the generated Java client for the OpenAPI JSON GET /user operation and compare its request serialization with the Spring Boot server's expected filter parameter. Reproduce the request using swagger-codegen-cli 3.0.34 and the provided schema reference, then verify that the server receives a deserializable object instead of null.