References to Confluence pages are rendered as plain text

Summary

Customers reported that references to Confluence pages are now rendered as plain text.
Until recently, mentioning a Confluence page name and surrounding it on brackets would create a link to the corresponding page.

Steps to Reproduce

1. In your project, set up a Project Link to a Confluence space. Set up the Space link on the Confluence side as well.
2. Add in the issue description or comments a reference to an existing page surrounded by brackets [ ] like in the example below:
   

Expected Results

The link to a respective Confluence page is created.

Actual Results

New comments or existing ones are now rendered as plain text, therefore there is no reference to the Confluence page.
Pasting an absolute link, or using the Wiki markup works as expected.

Workaround

None.