There's a number of ways to fix that 🛠️:
1️⃣ Restart your device and reenter the game.
2️⃣ Check for available updates.
3️⃣ Make sure your device software is updated to the latest version.
4️⃣ Delete the game from your device and redownload it from your device's application store. Don't worry, your game progress won't be lost so long as your device is connected to the internet.
5️⃣ Make sure your device meets the minimum system requirements.
🙅 If the problem persists, please contact Player Support. Provide the following information if possible:
🌱 Is the game always slow? Are there any actions that temporarily resolve the issue?
🌱 The first time you noticed the problem (after updating the game, reinstalling it, etc.).