Looks like a bug. But 234222 has been filed for the issue in EclipseLink (https://bugs.eclipse.org/bugs/show_bug.cgi?id=234222) if you want to reference it or add anything that I might have missed. EclipseLink will be the RI for JPA2.0 and will be the default JPA provider in glassfish going forward.
Best regards,
Chris
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