When a reviewer adds maintenance tags to an article via Special:NewPagesFeed (PageTriage extension), a notification is sent to the page author. It contains a link to thank (Thanks extension) the reviewer but the link navigates to Special:Thanks for confirmation. This is problematic because the user loses the context of what they were doing before looking at their notifications.
Process the thanks and the confirmation using AJAX without navigating away. This is how it works when thanking from history, diff, or Flow boards.