After a node is stopped then restarted, messages like the following appear in the log for 60 seconds:
13:34:23,360 WARN [org.jgroups.protocols.TP$ProtocolAdapter] (INT-1,shared=udp) JGRP000031: two/web: dropping unicast message to wrong destination 04cfb454-ea74-f632-6cbc-c52f086062a2
This is an upstream WildFly bug: https://issues.jboss.org/browse/WFLY-2632, so there's not much we can do about it currently.