A Match 3 mini-game may be quite demanding on devices, so please make sure that your device has at least 2 GB RAM, since this is the minimum requirement for the game itself. If you still experience issues, please contact Tech Support and provide information on when you experienced the issue, what resources were lost, and please also provide screenshots of the frozen playing field. With each update, we implement new changes to the mini-game to make sure that issues like this will not be repeated in the future.