You may already know this, but the Lesson button on the front page will only give you a set number of lessons per day. When you do that number of lessons, the Lesson button will show 0. There may still be lessons available, visible under the Advanced button, but you have done all your lessons for the day. Does that make sense?
This is where you pick how many lessons are available every day (under Settings-Ap). For me it’s 10, for you it might be a different number.
When I finish my 10 lessons for the day, my Lesson button will show 0, but more lessons will be available under the Advanced button.
This was implemented in February 2024. You can read the announcement here.