The 'Children display' macro in a Knowledge Base does not allow nesting

Issue Summary

There are cases where two Confluence spaces are connected to a single service project, with the project's customers being able to view KB articles from both Confluence spaces. However, with the Children Display macro used on one KB page which targets a page from the other space, the children display macro fails, showing an error.

Steps to Reproduce

1. On Confluence, create 2 spaces. Create some pages under each of these spaces. (E.g: SpaceA and SpaceB)
2. On the home page under SpaceA, add a Children Display macro, with the macro pointing to a page under SpaceB under 'Parent Page'
3. On JSM, in a service project, connect both SpaceA and SpaceB as Knowledge Base.
4. Login to the customer portal using a customer account. Using the customer account, try viewing the SpaceA Home page (Created on step 2) KB article.

Expected Results

The Children Display macro should show links to pages under the targeted space.

Actual Results

The Children Display macro shows the following error message:

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available