Skills aren't strengthening
I've tried to "strengthen" both Objects and Adverbs this morning. Neither is showing as full bars. It's not a matter of how I did on the lessons, either - I finished Adverbs with full hearts. Is this a glitch? Does Duolingo limit the amount of skills you can strengthen in a day?
Sometimes it takes more than once, depending on how many words haved decayed and how far. Especially in skills with lots of lessons.
I'm aware of that. But these skills have not strengthened at all. I tried 3 times with "Objects". The bar didn't move at all.