Demonstratives 3 - Is there something wrong wit this particular lesson?
I have done the strengthening exercise on this lesson many many times in the last couple of days - I got 20/20 in timed practice a few times but the strength bar is stuck at 4/5! I wouldn't mind repeating the exercise (and amass easy points on the way) if there is something new to learn!! It's got to the point that I know every, and I mean every, question in this lesson by heart!!
I had the same problem. The strengthening exercises (desktop and mobile) would only give me celui-ci, celle-ci, ceux-ci, and celles-ci. Redoing one of the lessons covered some of the other vocab words and allowed me to finally refresh the skill.
The strengthening algorithm seems to be bugging out on some skills. Try redoing the lessons within it instead, or just move on seeing as you already know it by heart. :)
I am afraid I like to keep my tree "golden" so I do the strengthening exercise whenever a topic turns coloured! Normally I find that refreshing exercises throw up useful new sentences which note down to learn. Anyway, I have redone only the first lesson as suggested and the strength bar moved to 5/5!!
You strengthen a "skill" not a lesson. But, yeah, it's buggy. That was the most painful skill for me so far.
Redo both "lessons" within the skill or try timed strengthen or try the app instead of the website (or vice-versa).
Yes, I presume everyone has a problem. There's a bug in there somewhere. Even after repeating the skill set without error, it is stuck on 4/5. Send a message to support or perhaps directly to Rémy and they can look into it.