HTML description not rendered for Advanced Roadmaps locked custom fields

Issue Summary

HTML description not rendered for Advanced Roadmaps locked custom fields (Parent Link, Target Start, Target End).

Steps to Reproduce

1. Unlock one of the Advanced Roadmap custom fields by following Unlock a custom field. For example Parent Link
2. In a project configuration edit the field configuration scheme and edit the Parent Link custom field to add a description to the field to be rendered in screens.
3. Insert an HTML description. For example:

   <span style="color:Gold;font-size:11px;font-weight:bold;">Golden Field</span>
   <span style="font-size:11px"> - Choose a parent to assign this issue to.</span>
   

   

4. Go to Administration > System > General configuration and toggle the HTML flag for custom field description to ON:
   
5. Navigate to Administration » Manage Add-ons, filter the visible add-ons by System Add-ons and search for "wiki", to find the Wiki Renderer Macros Plugin. Make sure it it enabled.
6. Add the Parent Link field to the Create issue screen for the project.
7. Create an issue and observe that the HTML is not rendered:
   

Note 1: Same happen with other locked Advanced Roadmap fields such as Target Start and Target End.
Note 2: For other locked field such the Agile ones (ex. Epic link) by doing same as above HTML is rendered:

Note 3: From Jira 8.7.0, the default behavior of the Enable HTML in custom field descriptions and list values items option has been changed so it is switched to OFF for new Jira installations and the upgraded ones that have never used it.
However for my test I set it on and same is with Jira 8.5.0 in combination with the affected Advanced Roadmap versions.

Expected Results

Given the changes made locked Advanced Roadmap custom fields HTML description should be rendered.

Actual Results

Advanced Roadmap custom fields HTML description are not rendered.

Workaround

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