WYSIWYG breaks excerpt-include macro when used as link tip

I have fould it very useful to use the excerpt-include macro in the link tip.
[Link Testing|Schema View|

{excerpt-include:Schema View|nopanel=true}

]

This works very nicely to display the excerpt of the "Schema View" page as the link tip. (I want to use this feature regularly to display glossary definitions.)

However, if I view the page with the WYSIWYG editor it automatically changes the link to this:

{excerpt-include:Schema View|nopanel=true}

"linktype="raw" linktext="Link Testing|Schema View|

{excerpt-include:Schema View|nopanel=true}

">Link Testing