iPhone: All notifications from my app disappeared after a new notification arrived

lately, we found out that all notifications from the app I developed suddenly vanished for no reason when a new notification arrived.

Mostly this case happened on iOS 16, and the notification has threadID by which we want to fulfill the notification grouping.

When I continuously sent 4-5 notifications to my iPhone this case will happen. Problem screen recording

did anyone encounter this situation? Why and how to fix it

iPhone: All notifications from my app disappeared after a new notification arrived
 
 
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