Board Thread:Plants vs. Zombies 2: It's About Time/@comment-26197906-20150312215221

Apologies if this has been answered before, but I couldn't find anything about it.

I'm playing Icebound Battleground and the level won't end. All the waves of zombies have come, there hasn't been a new zombie for 10-15 minutes, but the bag of coins that signals the end of the level won't appear. It's just stuck. I've tried restarting both the game and my iPad. Any suggestions for what I can do? Has this happened to anyone else? 