Classpath when using swagger-codegen-maven-plugin

When I use the:

 <groupId>io.swagger.codegen.v3</groupId>
<artifactId>swagger-codegen-maven-plugin</artifactId>
<version>3.0.29</version>

the CLASSPATH, that propably IntelliJ creates seems to be wrong:

It should include the third entry which I added manually:

Otherwise building the project with just maven from the command-prompt works just fine.

Using an older version, like 

 <groupId>io.swagger</groupId>
<artifactId>swagger-codegen-maven-plugin</artifactId>
<version>2.3.1</version>

works fine, on the command-prompt and using IntelliJ.

So I am afraid, that there is a problem with IntelliJ getting the CLASSPATH from Maven.

Btw:

I tried a workaround using:

<plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>build-helper-maven-plugin</artifactId>
    <version>1.7</version>
    <executions>
        <execution>
            <id>addsource</id>
            <phase>generate-sources</phase>
            <goals>
                <goal>add-source</goal>
            </goals>
            <configuration>
                <sources>
                    <source>${project.build.generated-src-path}/swagger/src/gen/java</source>
                </sources>
            </configuration>
        </execution>
    </executions>
</plugin>

which did not do the trick.

Is there any chance to get this fixed?

Regards

Stephan

I have uploaded a ZIP that contains a simple project to reproduce:

Upload id: 2021_10_25_GHKbeNWwMvJVMVQg (file: swagger-demo.zip)

This is the Version I am using:

IntelliJ IDEA 2019.3.5 (Ultimate Edition)
Build #IU-193.7288.26, built on May 6, 2020
Licensed to Sparda-Bank Hamburg eG / Stephan Klanck
You have a perpetual fallback license for this version
Subscription is active until January 7, 2022
Runtime version: 11.0.6+8-b520.66 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Windows 10 10.0
GC: ParNew, ConcurrentMarkSweep
Memory: 966M
Cores: 6
Registry:
Non-Bundled Plugins: Batch Scripts Support, CMD Support