-Online apps still utilize the [EnableKeepAlive](/refguide10/tricky-custom-runtime-settings/#session-duration) setting to maintain uncommitted data which changes during the session. If that setting is disabled, in Mendix apps version 10.9.0 and above where `useAuthToken` is set to `true`, uncommitted changes will be lost if an action is performed after the session expires, which occurs after the [SessionTimeout](https://github.com/refguide10/custom-settings/#SessionTimeout). In this case, the authentication token is used to reinitialize the session to keep user signed in, after which the application is reloaded.
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