which application server are you using?
I have seen this issue as well and I guess it's an Mojarra issue, perceivable in WildFly 8 <=Alpha2.
Could you try to use RF5 Alpha on older server/Mojarra?
I am using apache-tomcat-7.0.30 webserver.
And our production server is websphere 8 .
I will try in with older mojarra.
And many thanks for the reply.
We need to get this either fixed in RF or reported to Mojarra.
Please let me know how the issue stands.
There is a mix of RF4 jars and RF5.
After removing RF4 , render is working fine.