When editing an exisiting internal link in the ckeditor, the change is not saved if you don't make any other changes to the richtextfield.

Steps to reproduce on demoauthor:

• Create a page
• Create a text component that has some text and a link to some page and save
• Edit the text component again, change the link to point to another page, don't edit anything else
• Check with browser tools - the link now points to the new page
• Save
• The link still points to the old page, the change has been discarded