Before TWW I remember it worked for rares, now it doesn't look like anything in the interface.

SI never have a build-in rare track list. You might modify your file by yourself using method provided in issues (e.g. #415 ). We refactored Progress module (#743 ), so old methods won't work.

If you have a rare to check, you can add it by yourself in config (SI config > Quest Progress > User), which will continue to work after addon update.