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Realtime Chat application using MERN stack.
When a user is offline and someone sends msgs to that user, they will be stored in that offline user's wait queue and be flushed to him when he comes back online again.
* But that is not happening here. When a user logs in, he cannot see those messages that were sent to him when he was offline, just yet.
But if he refreshes the page once, he can see all the messages nicely.
The same is happening with socket events stored in waitqueues.
When a new message is received, the old messages are getting overwritten by the new message
Messages are diasappearing if we hit back button and login again. However, refreshing the page brings back all the messages.
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