What is wrong with duolingo?

The app has become completely unusable. It seems to log me out every 5 minutes, doesn't sync, and is really buggy. Not to mention the new hearts system is awful. I had 6 weeks worth of lessons that magically disappeared because the app didn't sync after I spent 30 minutes doing lessons and I wasn't logged in. Extremely disappointing for such a great app<br><br>Can we hit a Like to Hopefully get noticed by duolingo?