Why is calling abnormal when the Redmi Watch 5 is connected to the Bluetooth earphones?

First of all, we are very sorry for the inconvenience and trouble caused to you, we attach great importance to your feedback on this issue. Our initial understanding is that you are experiencing a technical issue that is known to us and we are working to resolve it.
If you receive incoming calls and the ongoing calling is silent when you are calling with the Bluetooth earphones, please refer to the following details:
1. In order to resolve your issue as soon as possible, it is recommended that you try hanging up the phone and redialing to get back to normal, which will alleviate the problem for the time being;
2. In the meantime, we have a detailed remediation plan in place and will address this issue completely in the next software update. Please rest assured that we will push the update as soon as possible.