html - TAL removes every TAG -

i'm using chameleon in pyramids framework , tal. unfortunately tal removes every tag first both.

html-template:

<label tal:attributes="for item.id">     <span i18n:translate="because:" tal:condition="item.leading_because">because:</span>     <span tal:repeat="premise item.premises" tal:attributes="for item.id; id premise.id">         <span tal:attributes="for item.id; id premise.id" tal:content="premise.title">premise</span>         <span tal:condition="not:repeat.premise.end">             <i><span i18n:translate="and"> , </span></i>         </span>     </span> </label> 

rendered example:

<li>     <input type="radio" name="discussion-button-group" onclick="location.href=&quot;http://localhost:4284/d/cat-or-dog/r/11/undermine/29&quot;" id="11">     <label for="11">         because: cats fluffy , cats small     </label> 

now i'm missing span-tags in "because ...", knows, why?

thx

i think closing tags messed up. not matching pairs.