MBean lifecycle methods should not be invoked from MSC threads, the implementation of these may block the thread, for instance due to a JNDI bind. https://issues.jboss.org/browse/WFLY-4211
Looks like this one is missing in 6.4.13.CP.CR2. The PR is still open.
Posponing to CP14
Verified with EAP 6.4.14.CP.CR1
Released with EAP 6.4.14 on March 14 (ZIPs) and March 22 (RPMs).