md-highlight-text prevents model updates

[elincognito]

If we have in our view something like
<h3 md-highlight-text="query">{{item.what}}</h3>
then in our controller changing item.what value won't cause the view to update
see: http://codepen.io/anon/pen/VLQrYR i believe this has to due with the fact that
quoting the doc "Highlighted text will be wrapped in " , would it be possible to watch for changes and update the wrapped span properly ?

In my use case i allow searching and editing by searching i filter items and highlight the properties that match the search, but in that case i cannot edit them because of this limitation