This sounds like a bug in the jboss-as plugin. Unfortunately, there is probably no workaround. Please create a JIRA for it in https://jira.jboss.org/jira/browse/JOPR so someone can look into it.
did you double check that you had selected the XA datasource option when creating it? I only had a look at the code and did not yet try it though.
Yes . I checked it many times. Same result.
Thanks for checking.