I tend to set unlimited lessons on for most decks, just because I prefer to learn in big batches rather than in a daily drip. However, when I use the “move to front of queue” with unlimited lessons switched on, the lessons aren’t actually moved to the front of the queue; yet when I turn unlimited lessons off, suddenly they are there.
Specifically, this is a problem when the Lesson Order Method is set to random, which unfortunately is not a setting a user can change, only the creator. I’ve never noticed this issue with chronological order decks, and have tested and found that the bug doesn’t persist, but I can’t change the Lesson Order Method for community decks ergo I’m SOL.
This is a bit of an annoyance because when I start a new deck, I go through and move all the things I already know to the front of the queue, so that I can quickly get them into the review pool and out of the way of things that would actually be new to learn. (I know I can just hibernate, but I like having the extra practice no matter how certain I am that I know that 私 is わたし in kana.)