BLE characteristic Notification received only once in iOS works fine for android

Am using BluetoothLe nuget by Aritchie for communication between a forms app and a external chip.
As the data was too large tried sending it in packets using the same characteristic notification.
For android am able to receive data with multiple notification but for iOS the notification event fires only once.
Is that some know issue with iOS as i remember we also can't get adapter status at start with iOS