Messages are not dispatched to consumers of Virtual Topic

[ab]

I have been using AMQ 5.8 configured for virtual topics for about 18 months
with minimum issues. Recently I have upgraded the AMQ to 5.12 and since
then, each ~24 hours I am experiencing the situation when messages that are
posted to a virtual topic are not dispatched to consumers. The AMQ
monitoring console indicates that number of pending messages are increased,
however no messages are actually dequeued so active consumers are not
getting any messages. If I click on 'Browse' then I don't see any messages
even when number of pending messages are around 50,000. The are no errors
reported in the AMQ logs nor any problems reported by the client. If I stop
the AMQ, remove the content from 'data' folder , start the AMQ then
everything is working for about one day and then I am experiencing the exact
problem again.
Consumers are not using any selector.

Has anybody experienced the same issue?

Any input appreciated.

I am including my configuration.

thank you

    <broker xmlns="http://activemq.apache.org/schema/core";
brokerName="event-broker" dataDirectory="${activemq.data}">

       <destinationPolicy>
            <policyMap>
              <policyEntries>
                <policyEntry topic=">" producerFlowControl="true" 
maxPageSize="40" maxBrowsePageSize="80"  durableTopicPrefetch="5"
topicPrefetch="5">
                  <pendingMessageLimitStrategy>
                    <constantPendingMessageLimitStrategy limit="10"/>
                  </pendingMessageLimitStrategy>
                </policyEntry>
                <policyEntry queue=">" producerFlowControl="true"
memoryLimit="30mb" maxPageSize="40" maxBrowsePageSize="80">
                 <deadLetterStrategy>
                         <individualDeadLetterStrategy
                         queuePrefix="DLQ." useQueueForQueueMessages="true"
/>
                 </deadLetterStrategy>

                </policyEntry>
              </policyEntries>
            </policyMap>
        </destinationPolicy>


   <destinationInterceptors>
      <virtualDestinationInterceptor>
        <virtualDestinations>
          <virtualTopic name="VirtualTopic.Event" prefix="Consumer.*."
selectorAware="true"/>
        </virtualDestinations>
      </virtualDestinationInterceptor>
    </destinationInterceptors>

        <managementContext>
            <managementContext createConnector="true"/>
        </managementContext>


       <persistenceAdapter>
            <kahaDB directory="${activemq.data}/kahadb"/>
        </persistenceAdapter>


          <systemUsage>
            <systemUsage>
                <memoryUsage>
                    <memoryUsage percentOfJvmHeap="70" />
                </memoryUsage>
                <storeUsage>
                    <storeUsage limit="300 gb"/>
                </storeUsage>
                <tempUsage>
                    <tempUsage limit="50 gb"/>
                </tempUsage>
            </systemUsage>
        </systemUsage>

        <transportConnectors>
           
            <transportConnector name="openwire"
uri="tcp://0.0.0.0:61616?maximumConnections=1000&amp;wireFormat.maxFrameSize=104857600"/>
            <transportConnector name="amqp"
uri="amqp://0.0.0.0:5672?maximumConnections=1000&amp;wireFormat.maxFrameSize=104857600"/>
            <transportConnector name="stomp"
uri="stomp://0.0.0.0:61613?maximumConnections=1000&amp;wireFormat.maxFrameSize=104857600"/>
            <transportConnector name="mqtt"
uri="mqtt://0.0.0.0:1883?maximumConnections=1000&amp;wireFormat.maxFrameSize=104857600"/>
            <transportConnector name="ws"
uri="ws://0.0.0.0:61614?maximumConnections=1000&amp;wireFormat.maxFrameSize=104857600"/>
        </transportConnectors>

       
        <shutdownHooks>
            <bean xmlns="http://www.springframework.org/schema/beans";
class="org.apache.activemq.hooks.SpringContextHook" />
        </shutdownHooks>

    </broker>

    <import resource="jetty.xml"/>
    <import resource="camel.xml"/>

</beans>



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