Here are some steps to make the app's performance better:

1. Try to change the source of the internet: if you use Wi-Fi, switch the internet connection to the mobile internet, for example;
2. Close all apps you don't use during the game;
3. ❗ Do not collapse the app: the system of the device usually unloads the app (if it's collapsed) to free the memory, and this can lead to the loss of the progress in the game you've started;
4. Not to answer phone calls or open notifications: as the game is online, it can be stopped as you collapse the app to do the following things.
5. If your opponent leaves the game, please do not close/collapse the game. Wait till the game ends.
6. If you lost coins without playing, please restart the game. The coins are usually restored automatically.