Two Bluetooth can not be used at the same time may be caused by the following reasons
1, it may be your current sound source caused, try to switch to a different sound source, or connect to a different device, use the exclusion method to check.
2, if you are using real wireless headphones, it may be due to the disconnection between your two headphones.
Extended data
Bluetooth headset is a small device based on Bluetooth technology, only need to hide this lightweight device in the side of the headset without direct use of communication equipment (mobile phones, computers, etc.) to achieve free call. Bluetooth headset is the application of Bluetooth technology in the hands-free headset, so that users can avoid annoying electricity
Reasons why two Bluetooth headsets cannot be used at the same time:
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1, there may be two Bluetooth headsets, before connecting the phone, the two Bluetooth headsets are not paired, so they can not be used at the same time.
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2, it is also possible that the maximum number of Bluetooth connections allowed by the phone is not set, in this case, you can directly go to the developer mode and set the maximum connection Bluetooth.
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3, there is also the possibility that the Bluetooth headset is about a different headset.