After Huawei nova2s is connected to Bluetooth audio, both the audio and the mobile phone send out a welink message prompt?

After the mobile phone is connected to the Bluetooth stereo, in order to prevent you from missing new messages, the prompt tones of new messages such as SMS, WeChat and welink messages are designed to remind both the mobile phone and the stereo (for example, when the mobile phone is connected to the Bluetooth headset, the prompt tones will be sent out at the same time at the mobile phone and the headset, which can effectively prevent you from missing new messages without wearing headphones). It's not a fault, please feel free to use it.