This thread is specifically for iOS devices. If you are experiencing this problem on an Android device, please check out the main thread for freezing/crashing after the 16.4 update.
For those on iOS devices, we are aware of an issue with the endless update loop occuring with the 16.4 update.
This should be resolved fully, but if you are experiencing the issue on an iOS device, please try reinstalling the game. If you are still experiencing this issue, please let us know what the iOS device.