If you would like to keep the connection of your users to the application live, you can enable auto-reconnect to Chat.
Please check how to keep a Chat connection live using different SDKs and Server API here:
iOS SDK - Connection | Chat | iOS SDK | QuickBlox
Android SDK - Connection | Chat | Android SDK | QuickBlox
React Native SDK - Connection | Chat | React Native SDK | QuickBlox
Flutter SDK - Connection | Chat | Flutter SDK | QuickBlox
Feel free to check our official documentation for more information that will help you to integrate QuickBlox services into your applications / projects or contact our Support team by submitting a ticket if you have any other questions.