[BUG] OneOf java classes not getting generated as part of codeGen in gradle plugin 4.0.0

When I generate sever stub for spec having OneOf tags, the code generation gradle task is successful , but in the generated models package OneOf*.java classes are missing.

I am using org.openapitools:openapi-generator-gradle-plugin:4.0.0 for "jaxrs-jersey" generatorName.

For example for below YAML file class "OneOfSofa1Sofa2" is not getting generated , but it is referred for variable "sofaStyle" in generated class Home.java

I have attached the YML as txt
home.txt

Below gradle task was used:
openApiGenerate { generatorName = "jaxrs-jersey" inputSpec = "$rootDir/src/main/resources/home.yml".toString() outputDir = "$rootDir".toString() apiPackage = "com.home.rest.resources" invokerPackage = "com.home.rest" modelPackage = "com.home.rest.model" modelFilesConstrainedTo = [] configOptions = [ dateLibrary: "java8" ] }

Screenshot of how it looks in editor

Reproduce the issue with the attached home.yml and the shown openApiGenerate Gradle configuration using the jaxrs-jersey generator. Inspect the generated model package, including Home.java and the missing OneOfSofa1Sofa2.java class. Done means the OneOf class is generated and the sofaStyle reference resolves successfully.