The game behaves in such a manner when influenced by an unstable internet connection. Since Tennis Clash is an online multiplayer game, it needs not only a strong Wi-Fi signal but also a stable connection.
If you are experiencing issues with your connection, please try the following steps:
- Try using a different Wi-Fi network
- Switch between Wi-Fi <> mobile data
- Restart your router for a few minutes
- Restart your device and games entirely
These steps should help you isolate the issue or even quickly fix it. If not, reaching out to your local ISP is the best alternative, as they will be able to help you understand what is causing this instability.