Message Sender Macro breaks the page layout if a message is sent right after the page is saved when in-place editing

STEPS TO REPRODUCE

1. Login with Admin and enable Message Stream from Administer Wiki > Other > Message Stream
2. Edit in-place a page
3. Click on Insert > Other Macros
4. Search for Message Sender and click Select
5. Click Submit
6. Click Save & View
7. Insert a message
8. Click 'Share'

EXPECTED RESULTS

The message is sent properly.

ACTUAL RESULTS

The page gets broken, the Panels, Menus, Navigation Bar are not displayed anymore (see screenshot).

However, if the page is refreshed first right after save (before any message is sent), the issue does not occur.
Also, the issue doesn't reproduce if the macro is added in WYSIWYG mode.