REST interface percent (%) not encoded when defined in a template parameter

When the URL is defined as http:// host:ort/root_context/service/{param}

With parameter defined as follow:

•    name : param
•    value : REST_%_TestOfPercentEncoding
•    Style: TEMPLATE
•    Level : RESOURCE

Systematically the following error is returned whatever the encoding is activated or disabled

         Thu Jun 04 16:32:14 CEST 2015:ERROR:An error occurred [URLDecoder: Incomplete trailing escape (%) pattern], see error log for details

while normally URL should be encoded as follow http:// host:ort/root_context/service/REST_%25_TestOfPercentEncoding

==> I do not understand what to do to make the URL works correctly in case of TEMPLATE.

Note that, it works correctly for the other cases:

* When I  redo the test with

        Style: QUERY

   the URL is correctly encoded as

       http:// host:ort/root_context/service?param=REST_%25_TestOfPercentEncoding

* When I  redo the test with

       value : REST_ _TestOfSpaceEncoding

       Style: TEMPLATE

   the URL is correctly encoded as

       http:// host:ort/root_context/service/REST_%20_TestOfSpaceEncoding

Regards