log4j2 (2.6.2) configuration not deleting old log files - log4j2

Question

I have the following log4j2 xml configuration that I'm using to log TRACE and DEBUG level messages.
<Configuration status="WARN" packages="" monitorInterval="300">
<Properties>
<Property name="log-path">/logs/webapp</Property>
</Properties>
<Appenders>
<RollingFile name="TRACE" append="true" immediateFlush="true" fileName="${log-path}/trace.log" filePattern="${log-path}/trace.log.%d{MM-dd-yyyy}">
<PatternLayout>
<pattern>%d{DEFAULT}: %-20C{1} : %m%n</pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy />
</Policies>
<DefaultRolloverStrategy>
<Delete basePath="${log-path}" maxDepth="1">
<IfFileName glob="*/trace.log.*" />
<IfLastModified age="14d" />
</Delete>
</DefaultRolloverStrategy>
</RollingFile>
<RollingFile name="DETAIL" append="true" immediateFlush="true" fileName="${log-path}/detail.log" filePattern="${log-path}/detail.log.%d{MM-dd-yyyy}">
<PatternLayout>
<pattern>%d{DEFAULT}: %-20C{1} : %m%n</pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy />
</Policies>
<DefaultRolloverStrategy max="15"/>
</RollingFile>
</Appenders>
<Loggers>
<Root level="trace">
<AppenderRef ref="TRACE" level="trace"/>
<AppenderRef ref="DETAIL" level="debug"/>
</Root>
</Loggers>
</Configuration>
The intention for this configuration is that the trace log files 14 days and older would be deleted but this is not the case. I have much older trace log files on my system still, the oldest being trace.log.11-02-2016
I'm aware of file deletion issues in log4j2 up to version 2.5 and 2.5 introduced the Delete configuration element but I am using 2.6.2.
Has anyone come across this and been able to get it to work either via an implementation version update or a configuration change?