We have encountered some strange behavior when editing links in the TinyMCE editor. When creating a link using the "Page" radio button and entering "Remaining url" the information is not preserved correctly. The behavior is only reproducible inside a TinyMCE editor, not on Url properties.

It occurs on a freshly installed Alloy site with all the latest updates, namely:

Episerver 11.11, TinyMCE 2.7.1

How to reproduce:
1. In Cms Edit: open a page with a XhtmlString property (such as About us on Alloy)
2. Enter some text and select Insert link
3. Choose Page and select a page
4. Enter a value in Remaining Url
5. Publish

At this point the link works correctly

6. Reload Cms Edit window
7. Click Insert/edit

At this point the link is changed to External

8. Edit any part of the XhtmlString to trigger a Save then Publish

The link no longer works and instead looks something like on the public site: /EPiServer/CMS/Content/en/alloy-plan,,6/test?epieditmode=False&epsremainingpath=test

Is this a known bug? Is there a workaround?