Filtering replaces tokens it should not be replacing

What is described below is attached as an example that duplicates this

When filtering is turned on and a token ends with .url then very strange things happen

The assembly descriptor uses
<files>
<file>
<source>$

{basedir}

/src/config/xml/applicationContext.xml</source>
<outputDirectory>xml</outputDirectory>
<filtered>true</filtered>
</file>
</files>

The file being filtered contains:
<beans>
<bean id="ThisIsATest">
<property name="wapURLMessage" value="$

{wap.url.message}"/>
<property name="wapURL" value="${wap.url}"/>
<property name="vanityURLMessage" value="${vanity.url.message}"/>
<property name="vanityURL" value="${vanity.url}"/>
</bean>
</beans>

After the assembly is run the file contains:
<beans>
<bean id="ThisIsATest">
<property name="wapURLMessage" value="${wap.url.message}

"/>
<property name="wapURL" value="This is a not a URL but demonstrates the BUG/test1"/>
<property name="vanityURLMessage" value="$

{vanity.url.message}

"/>
<property name="vanityURL" value="This is a not a URL but demonstrates the BUG/test1"/>
</bean>
</beans>

The string This is a not a URL but demonstrates the BUG comes from the url tag defined in parent pom
The string test1 is the artifactId