See WildFly announcement:
In WildFly 10.1, JBeret is upgraded from 1.2.0.Final to 1.2.1.Final, to fix a couple of bugs based on community input. More details please see
- [WFLY-6757] - Upgrade JBeret from 1.2.0.Final to 1.2.1.FInal
If you are using previous versions, I'd encourage you to try WildFly 10.1 and JBeret 1.2.1 and upgrade. Any comments and feedback, please let us know.