Duolingo has a new learning system with a "limited mistake counter" (5-6 'hearts') a day (or else you loose the 'quest'). Yes, I truly hate it. And I even hate more, that even harder bonus-questions, which give no no bonus, reduce your counter if answered wrongly.
dafuq.
(oh, yes, you can gain new 'hearts' doing 'exercises' or with
crystals' - or you wait)
dear #dulingo give me a bonus for your added bonus-questions.