Game Froze (again!) Lost all my boosters Level 864

Caro

Game has been freezing a lot lately.  I play on my Nook.  When it happens I have to power off.  This time I lost all my boosters -and I had a lot of them!

StuckInATree

What OS does your Nook use?

Caro

What OS does your Nook use?

It's an android operating system, proprietary to Nook. I have read on other sites that people are having same problems after last update.