At this moment "RemoteConnectionFactory" configured in messaging subsystem in standalone-full-ha.xml or domain.xml in "full-ha" profile is not ready to failover by default. Please change:

<connection-factory name="RemoteConnectionFactory">
                        <connectors>
                            <connector-ref connector-name="netty"/>
                        </connectors>
                        <entries>
                            <entry name="java:jboss/exported/jms/RemoteConnectionFactory"/>
                        </entries>
</connection-factory>

to:
<connection-factory name="RemoteConnectionFactory">
                        <connectors>
                            <connector-ref connector-name="netty"/>
                        </connectors>
                        <entries>
                            <entry name="java:jboss/exported/jms/RemoteConnectionFactory"/>
                        </entries>
                        <ha>true</ha>
                        <block-on-acknowledge>true</block-on-acknowledge>
                        <retry-interval>1000</retry-interval>
                        <retry-interval-multiplier>1.0</retry-interval-multiplier>
                        <reconnect-attempts>-1</reconnect-attempts>
</connection-factory>
This will guarantee that clients using this connection factory will failover to backup.