After typing an almost correct grammar point, which is not rejected nor accepted but a help-sentence shows up, the grammar point automatically displays below. This is annoying because I sometimes see the answer unintentionally. I think this bug has been happening on and off for the past months. It happened at all of my “almost correct” grammar points in the reviews today, and here is a screenshot.
As you see, after typing the almost correct grammar point に基づいて, the correct grammar point を基に shows up. I think this is a bug since the correct grammar point should only show when you have typed a correct or incorrect answer, not mid-typing.