Abstract: Techniques are described for preventing loss of notifications during network disconnections (e.g., during temporary network disconnections that last a number of seconds or minutes) for network communication scenarios where the client device and service have a persistent network connection. For example, notifications can be stored in a message store while a client device is disconnected from a network (e.g., from a network communication channel). The notifications can be stored in association with a time-to-live (TTL) value that is associated with a notification type of the notification and/or with other notification ordering parameters. When the client device reconnects to the network, the stored notifications can be sent to the client device in an order that is based at least in part on the TTL values of the notifications and/or other notification ordering parameters.