Links from other WYSIWYG fields are removed if the page is saved while a WYSIWYG field is edited in full screen

Follow this steps to reproduce:

• edit Blog.BlogIntroduction in "Inline form" edit mode
• add a link to the summary WYSIWYG field
• edit the content WYSIWYG field in full screen
• click "Save & View" while editing the content field in full screen

If you edit the page again you'll see that the link added to the summary field has been removed.