Anchors being unwraped from text

[Hugo Inacio]

The following code:
<p>This is a <a id="Test" class="anchor">test</a></p>

passed through jtidy comes out as:
<p>This is a <a id="Test" class="anchor" />test</p>

Any reason why the 'test' text is being moved out of anchor? If yes, is there a way to stop this behavior?

Thanks