EclipseLink Moxy with Java11 - eclipselink

Question

I asked this questions already here:
https://www.eclipse.org/forums/index.php/t/1098133/
Now, after 3 weeks, i hope to have luck to reach a response here in stackoverflow.
I have a RCP applcation using MOXy to parse complex XML, the annotated classes are generated by XJC, and the package contains a ObjectFactory and a jaxb.properties pointing to MOXy.
The problem: The application works with Java8, but starting the application with Java11, i get this exception:
java.lang.RuntimeException: javax.xml.bind.JAXBException
- with linked exception:
[Exception [EclipseLink-50000] (Eclipse Persistence Services - 2.7.4.v20190115-ad5b7c6b2a): org.eclipse.persistence.exceptions.JAXBException
Exception Description: The context path mypackage contains no ObjectFactory or jaxb.index, no external metadata was found in properties Map, and sessions.xml was found or was invalid.
Internal Exception: Exception [EclipseLink-7095] (Eclipse Persistence Services - 2.7.4.v20190115-ad5b7c6b2a): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The sessions.xml resource [sessions.xml] was not found on the resource path. Check that the resource name/path and classloader passed to the SessionManager.getSession are correct. The sessions.xml should be included in the root of the application's deployed jar, if the sessions.xml is deployed in a sub-directory in the application's jar ensure that the correct resource path using "/" not "\" is used.]
My target platform contains:
org.eclipse.persistence.moxy_2.7.4....jar
jaxb-osgi-2.3.2.jar
jakarta.activation.jar
jakarta.xml.bind-api.jar
I use Multi-Release: true to be able to handle Java8 vs. Java9+.
In the main MANIFEST.FM i require org.eclipse.persistence.moxy.
In the versions/9/OSGI-INF/MANIFEST.FM I add the import packages: com.sun.xml.bind.v2, javax.xml.bind
To start the application in the Eclipse run configuration dialog, i switch the JRE Java8 vs Java11, and in the plugins tab, i remove (J8) or add (J11) com.sun.xml.bind.jaxb-osgi (jaxb-osgi.jar) to make it startable.
Can someone help?
regards
Frank