'Words' flashcards always showing the same small set
From the 'Words' menu at the top of the page, you can see the list of all words you've been exposed to, and your success with them (which fades over time if you don't review them). I see that this is meant to give you an opportunity to self-test 'stale' words.
However, when I do this little flashcards quiz, I always see the same words - a set of about a dozen or so, in the same order every time (so, I get them correct easily). I have a list of hundreds of words! And many are 'stale', so I want to use this feature. Am I missing something about how it is supposed to work?