Firebase messaging campaign doesn't deliver iOS notifications

Hello team, I have been using FCM push notifications since January in my app, and I have been sending campaign messages everyday since then to both Android and IOS. Since yesterday, when I create a campaign and target my IOS app, the notifications are not getting delivered even if it shows the number of sends as 80.

Interestingly, when I am trying to send a test notification using a specific FCM token, then it is being sent. Also via my code , in the app if any notification is triggered, then that is also getting delivered.

I really need to keep sending campaign messages daily, any suggestions or help will be much appreciated?

Firebase messaging campaign doesn't deliver iOS notifications
 
 
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