custom delimiters doesn't work as expected

The algorithm doesn't work as described in http://maven.apache.org/plugins/maven-resources-plugin/apidocs/org/apache/maven/plugin/resources/ResourcesMojo.html#delimiters
The implementation of org.apache.maven.shared.filtering.MultiDelimiterInterpolatorFilterReaderLineEnding.read() contains several bugs
if the first letter of the endToken is contained in the propertyname then the property is not filtered.
(e.g. abcFILTER.a.MEabc)
if the first letter of the endToken is contained in the startToken then the property is not filtered.
(e.g. aaaFILTER.a.MEaaa)

<plugin>
<artifactId>maven-resources-plugin</artifactId>
<configuration>
<useDefaultDelimiters>false</useDefaultDelimiters>
<delimiters>
<delimiter>aaa*aaa</delimiter>
<delimiter>abc*abc</delimiter>
</delimiters>
</configuration>
</plugin>