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question

ESP32S3 does not receive notifications after ANCS bonding is successful, and needs to turn on and off Bluetooth in the iOS system again to receive notifications.

environment

I use the esp-idf ble_ancs demo, and the chip uses esp32s3. The esp-idf version is v5.4, and the iOS version is v18.4

Reproduce steps

As described in the title, I found an ESP-BLE-ANCS device in the system Bluetooth, clicked on connect, selected pairing in the Bluetooth pairing request pop-up box, and selected allow in the allow notification pop-up box. The logs were normal, but I did not receive any notifications from iOS.

After turning on and off the system Bluetooth again, the device reconnected normally, and notification messages can now be received normally.

Has anyone encountered the same problem? Currently, I suspect it's an issue with iOS, but I haven't found any description of this phenomenon online.

Expected results

After ANCS bonding is successful, I will receive a notification without the need to turn on Bluetooth again.

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