Page titles with curly or square brackets cannot be saved as bars in the Roadmap Planner macro

Summary

When using the Roadmap Planner macro on a Confluence page, you cannot use pages as Bars which have a page title containing a curly or square bracket. I tested with many other characters but so far only identified these two as problems. Nothing is present in the logs.

Steps to Reproduce

1. Add a Roadmap Planner macro to a Confluence page
2. Edit the macro and click on a bar to edit it
3. Link or add a new page which contains a bracket in the page title
4. Save the macro and save the page

Expected Results

1. The page with brackets in the title is saved as a linked page in the bar

Actual Results

The page is not saved upon one refresh of the page. The change is lost and nothing is in the logs.

Workaround

No known workaround yet other than to refrain from using brackets in the titles of linked pages.