Board Thread:Game Discussion/@comment-31695308-20170814110207/@comment-29799506-20170815125709

For WTTT, the flag for claiming a reward is set on the device, not on the cloud. Sometimes the flag is not set properly, so when you load the game after the WTTT, you won't get any prompt screen telling you to claim the reward.

In other cases, the flag is set, but when you load the WTTT screen, you won't get the reward. As Sirbel said, this is probably due to bad Internet connection. I have not tested this, but a probable fix would be force quit the game and try again. Loading cloud save will not work. Again, the flag is set on the device, not on the cloud.

The best fix is to have two devices, which half your chance of being screwed. The second best fix is to backup the game file of the game. I am on iOS, so this means I have to backup the whole device. If you fail to claim the reward, restore the game file (or the whole device) and try again. It's also a good idea to do multiple backups. For iOS at least, sometimes one device doesn't work, but another one that's a few hours earlier work.

For iOS the whole process is very annoying. If you have a lots of data (e.g. photos), the whole device restore process could take over 30 minutes. You may even need to delete lots of photos/videos to make room for the device restore. And after you restore, you have to re-enter all the password for your Apple account, e-mail accounts, Facebook, etc. etc.