react-native-ble-plx: [iOS] monitorCharacteristicForDevice fails with error Characteristic 0000ffe1... notify change failed for device 4221AED1... and service 0000ffe0... on sensor tag

Expected Behavior

To be able to subscribe using monitorCharacteristicForDevice() as expected on iOS.

Current Behavior

On iOS trying to monitor the button pressed characteristic on an Sensor Tag/iTAG fails returning the following BleError: Characteristic 0000ffe1… notify change failed for device 4221AED1… and service 0000ffe0….

Context

The strangest thing is that the very same code DOES WORKS perfectly well on Android, being able to observe Sensor Tag/iTag button presses without getting any issues.

• Library version: 2.0.0
• Platform: iOS
• Formatted code sample or link to a repository:

const subscription = bleManager.monitorCharacteristicForDevice(
  deviceId,
  serviceUuid,
  characteristicUuid,
  (error, result) => {
    if (error) {
      console.log("ERROR ON MONITOR =", error);
      return;
    }
    console.log("MONITORED =", result.value);
  }
);

Am I missing some extra step on iOS that is not required on Android?

Thanks in advance!

Cheers,

Federico