Can't recieve notifications when Mobile phone is turned on from shutdown state

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I'm working on an app that receives notifications using Firebase Cloud Messaging in flutter.

I can receive notifications in Background, Terminated, and Foreground perfectly.

However, when I try to turn off(Shut it down) my phone and send notifications from FCM Console I only receive the latest sent notification or sometimes I don't receive anything at all.

For example, I sent 4 notifications from the FCM console when my Phone is shut down(dead) when I turn it on again. Instead of receiving 1, 2, 3, 4 notifications I only receive the last notification 4 and sometimes none at all!

Any links to read and any details as to why this behaviour is occuring is a very big help.

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