Arena Reward Bug

Hello, I'm a Plants vs. Zombies 2 player that like to report a bug. This was happening when i was casually playing arena to earn the butterfly plant and something odd happening. In the arena reward screen, i already acquired 311 crowns, but in reality i only have 301 crown (see the picture below). And also when in checking my plants inventory, i still haven't open the new plant yet. I hope this will get fixed on my account soon, really need that buttercup. 

Also sorry for my english. 

Thanks.