Lag and crash

After the latest update that introduced the long overdue edit mode, the app will start to lag and crash soon after during game play. Its annoying, especially when I go back into the app afterward and have to start the level over rather than continue at the point where it crashed. There is a chance that this is unrelated to the update, but it happens on both wifi and 4G, and it does not happen with anything else on my phone.

John  about Bloons Monkey City