Why do I suddenly lose all my gems???
I have been using Duolingo on iOS to learn German for 10 days. I kept learning everyday and have a ten-day streak now. Suddenly, when I was using Duolingo, I lost all my health, although I made very few mistakes. I kept practicing for 3-4 times, but the no health restored. Then I find although I have 93 Lingots, there are no Gems. I happened all in a sudden! Anyone encountered this before?