'Before Ad' field truncating on each edit

Hi Guys

Love the plugin, everything is working well except when I go to edit an Ad group.

I use the Before ad and After ad fields to encase my ad content in a div. So Before ad: <div class="dfrads-content"> and After ad: </div>

When I edit the Ad group the Before ad field is truncated to <div class= and also this text " class="dfrads_longtext" /> appears to the right of the field box.

This happens every time. Any clues? As long as I manually fix this each time I edit the Ad group everything works as expected, but it’s the kind of thing that will catch out my client.

Many thanks
Shaun