Instructional text in templates is not working

Problem

Adding instructional text to a template will result in plain text instead.

Environment

Confluence 8.5.6, not reproducible on 8.5.5 or prior.

Steps to reproduce

• Go to   > General Configuration > Global Templates and Blueprints
• Create a new Global Page Template that I called Page Template 
• Add a line of text and a line of Instructional Text
• Go ahead and create a new Confluence page using this new template
• Upon publishing the Page, we can see that both texts are shown.

2024-02-15_10-30-18.mp4

Expected Results

Upon publishing the Page, we should see the normal text being displayed but the instructional text should not be displayed when viewing the page

Actual Results

We can see that instructional text when viewing the page has normal text.

Workaround

1. Install "Confluence Source Editor" add-on
2. Go to Space Tools > Content Tools > Templates or go to    > General Configuration > Global Templates and Blueprints
3. Locate/Create the template which you would like to add the instructional text
4. Click on "Edit"
5. Click on "<>"
6. Add instructional text between <ac:placeholder> tags. i.e:

   <ac:placeholder>Some Instructional Text</ac:placeholder>  

7. Save the template

Notes