When end-users elect to get notified of admin comments on ideas they support, they get a notification email which includes links to the idea, the forum, and the category (if applicable).

The link which is titled "category name" does not link to the category in question, instead it links to hot ideas on the forum.

screenshot showing link in email notification: https://example.com

This does not happen for the notification end users receive when an admin messages subscribers. In that case, the link DOES take you to the category in question.