If you keep getting disconnected from Flex City servers during missions, the most common cause is an unstable internet connection.
Try switching between Wi-Fi and mobile data, restarting your router, or moving closer to the signal source to maintain a stable connection during gameplay.
Another helpful step is restarting the game and clearing the app cache from your phone’s settings. Corrupted temporary files or background processes can interfere with the connection and cause the game to disconnect from the server.
You should also update the game to the latest version and close other apps running in the background.
Older versions or low device resources can lead to connection drops, especially in online missions that require constant server communication.
This is the information we have, but if you have more insights from your experience, please share in the comments.