The hosted page is served via a RequestDispatcher.include instead of a RequestDispatcher.forward. As a result, the page is not properly sent to the client. The effect might not be noticed in a standalone Jboss, but when the hosted page is served via mod_cluster, the source code of the page is shown because content type is text.
This needs to be fixed and back ported to EAP 6.3 CP01 (as I understand no more blockers accepted for 6.3)
This issue should be fixed in EAP 6.4 release.
Fixed in upstream.
Pedro Igor <pigor.craveiro> updated the status of jira PLINK-413 to Resolved
Verified in 6.4.0.DR11