Specifying a space key for a page that has a colon (:) right after the first word in the title and it exists on the same space where the Include Page macro is included removes the space key after first edit

Issue Summary

Currently, if a user specifies a page link inside the Include Page macro using the Space Key parameter and the page happens to have the colon ( right after the first word in the title, the macro will remove the space key and consider part of the title as the space key value when you first edit the page where the macro is placed.

If the page title is ‘THIS: is a test title created’

This:

MAL:THIS: is a test title created

Becomes this:

THIS: is a test title created

Adding the space key parameter again seems to fix the issue and editing the page can be done normally.

Documentation on the macro

https://confluence.atlassian.com/doc/include-page-macro-139514.html

Steps to Reproduce

1. Create a new page that contains a colon right after the first word in the title
2. Publish the page
3. Create a new page on the same space as the previous one
4. Add the Include Page macro
5. Specify the previously created page using space key value (eg. SPC:THIS: title)
6. Publish the page
7. Edit the page

Expected Results

The space key value is still there and the page is found

Actual Results

The space key value is removed and the page is not found.

Before publishing the page

After publishing the page

First page edit

notice the missing space key

First edit, view mode

Workaround

Edit the page and add the space key back. After the first edit, the space key value sticks to the original value.