Camel markerFile not deleted if file consumer is used with pollEnrich and custom aggregation strategy

Suppose a Camel route that uses pollEnrich to enrich messages using a file consumer

    <route id="timerToLog" trace="true">
      <from uri="timer:foo?period=1000&amp;repeatCount=1"/>
      <pollEnrich strategyRef="replaceAggregationStrategy" >
        <constant>file:target/pollEnrich?fileName=enrich.txt&amp;readLock=markerFile</constant>
      </pollEnrich>
      <to uri="mock:result"/>
    </route>

While the file to enrich from is read correctly, the markerFile does not get deleted if a custom aggregationStrategy is configured. As a result the file remains locked and does not get moved to .camel/ folder and no further exchanges will be processed.