Code macro losing lines when using Wysiwyg

If use Wysiwyg editor to paste the following to the code macro the first line will be replaced by empty line. If use source editor then everything is fine until next time the document is opened for editing using Wysiwyg editor.

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Request version="1.0">
 <FreeText language="ISO639-1 Languagecode"></FreeText>
 <Content>
  <Group>
   <Value type="ValueType"></Value>
  </Group>
 </Content>
</Request>