%DISPLAYTITLE% format does not work

[pskyechology]

List of steps to reproduce (step by step, including full links if applicable):

• Use %DISPLAYTITLE% in format (example: https://tagging.wiki/wiki/Untitled_Tag_Game_Wiki:Community_index?oldid=82644)

What happens?:
Links only use their canonical title.

What should have happened instead?:
Links to pages with displaytitle should have used it.

Browser information, screenshots and other applicable information:
Can replicate on Mirabeta.