If a schedule has a daily review limit set on it in the settings, and the limit is below what the schedule actually "wants" you to review that day, and there are also new terms available to learn in that schedule, the Extra Review button accessible after clicking on the schedule doesn't work properly. Instead of allowing you to review the extra scheduled terms, it takes you straight to the new terms just as if you'd have pressed the "Learn" button on the home screen.
The issue is device independent as it's been tested both on Android app and on a PC.
I've encountered it in the Intermediate Japanese grammar schedule and the Words for Intermediate vocab schedule, but it's likely it's schedule independent, I just don't have other schedules meeting the conditions right now.
