Question [Q] Bluetooth problem pls advise

hi
im using the bluedio AV890 bluetooth stereo head set yes it works fine and the effect is great.but when i disconnect it from my phone my phone seems to automatically go into silent mode and the only way i can make it to normal is by rebooting the phone
what i do when i dont want to use the Headset is just disconnect the bluetooth via the phone.Am i doing something wrong kindly advise and thanks in advance
Thanks,
Hari
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