generator "spring" writes sourceFolder property not into generated pom.xml (Batch-Mode)

Iam using Docker-Image "openapitools/openapi-generator-cli:v5.3.0" for Code-Generation.

Description
I placed theOriginal petstore.yaml in dir:
"~/example/volume/spec-files/petstore.yaml"

Batch-Generation-Config at: "~/example/volume/generator-configs/pestore-server.yaml"

inputSpec: ./volume/spec-files/petstore.yaml
outputDir: ./generated/java/spring/server-demo
generatorName: spring
artifactId: petstore-demo-server
artifactVersion: 0.0.1
groupId: de.demo
additionalProperties:
  snapshotVersion: false
  useBeanValidation: true
  library: spring-boot
  sourceFolder: src/gen/java/main
  interfaceOnly: true
  artifactUrl: https://not-set-demo.de
  basePackage: de.demo.server
  apiPackage: de.demo.server.api
  modelPackage: de.demo.server.model
  configPackage: de.demo.server.config
  unhandledException: true
  hideGenerationTimestamp: true
  dateLibrary: java8
  serializableModel: true

Steps done with Docker-Container:
Spin up a container in interactive mode with a volume mount to "~/example/volume/" Container-Internally as "/volume"
Open up a Terminal under ~/example/

docker run -it -v "${PWD}/volume:/volume" --entrypoint /bin/bash --rm openapitools/openapi-generator-cli:v5.3.0 

In running Container: create a alias for the entrypoint of the generator image.

alias openapi-generator='/usr/local/bin/docker-entrypoint.sh'

In running Container: test if the generator prints out the help information, to see if its working

openapi-generator --help

In running Container: validate your Spec-File

openapi-generator validate -i /volume/spec-files/petstore.yaml

In running Container: Generate-Code

openapi-generator batch ./volume/generator-configs/*.yaml

Result
As Result the code is generated, but the sourceDirectory Tag in generated pom.xml is not set to the value of the Additional-Property -> "sourceFolder: src/gen/java/main".
the default is set here in pom.xml to "src/main/java".

But Dokumentation says that this value should reflect into pom of the generated code.

cat-output of pom.xml

cd /generated/java/spring/server-demo

cat pom.xml 

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>de.demo</groupId>
    <artifactId>petstore-demo-server</artifactId>
    <packaging>jar</packaging>
    <name>petstore-demo-server</name>
    <version>0.0.1</version>
    <properties>
        <java.version>1.8</java.version>
        <maven.compiler.source>${java.version}</maven.compiler.source>
        <maven.compiler.target>${java.version}</maven.compiler.target>
        <springfox-version>2.9.2</springfox-version>
    </properties>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.3.RELEASE</version>
    </parent>
    <build>
        <sourceDirectory>src/main/java</sourceDirectory>
    </build>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-commons</artifactId>
        </dependency>
        <!--SpringFox dependencies -->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>${springfox-version}</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>${springfox-version}</version>
        </dependency>
        <dependency>
            <groupId>jakarta.xml.bind</groupId>
            <artifactId>jakarta.xml.bind-api</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-jsr310</artifactId>
        </dependency>
        <dependency>
            <groupId>org.openapitools</groupId>
            <artifactId>jackson-databind-nullable</artifactId>
            <version>0.2.1</version>
        </dependency>
    <!-- Bean Validation API support -->
        <dependency>
            <groupId>jakarta.validation</groupId>
            <artifactId>jakarta.validation-api</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
    </dependencies>
</project>

Reproduce the issue with examples/v3.0/petstore.yaml, the batch-generation config, and the spring generator entry point, then inspect the generated pom.xml. Compare the sourceFolder additional property with the generated sourceDirectory and add or update coverage so the configured value is reflected in the pom.xml.