Every once in a while, I lose all my boosters at random. This doesn't bother me much since I play often enough to win them back and don't use them much anyway. But today was the third time I've randomly lost progress on the app. I hadn't updated or done anything different. I played level 1864 at the start of my lunch break, closed the app, ate my lunch, and opened the app to see I now had the pleasure of trying to beat level 1834. Again. I have screenshots to prove that I've beaten levels beyond 1834 because I had a feeling it was bound to happen again. After over three years of playing, I'm about ready to delete the app and quit the game entirely.