Firebase notification with topic are not received

[ahmed10099]

I had a flutter app , and I am sending notifications using firebase from my backend using topics, the notification are working perfect in foreground and background. the problem is after one day or two days it stops receiving the notification by topic, but when I make a test notification from the firebase website and send it by the device token , it reach successfully but if I send it by the topic it do not reach . So i figure that the issue is from the subscribe to the topic , so I make a logout from the app and login again so the app will make unsubscribe from the topic and get a new fresh subscribe, but this also do not work. The only temporary solution is to clear the data from the mobile device storage, after that when I make login , it receives the notification by the topic without a problems. this issue is happening for the Android and IPhone devices. Can some one help please with this issue. This problem was only showing recently when I had updated my flutter version