Smart monitor sound plays on both monitor speaker and Bluetooth headphones

[userIMW3v1Dzu5]

I have annoying problem that when I connect my Sony wh-1000xm4 bluetooth headphones to my Samsung monitor m7, it plays sound of Youtube videos on both the monitor and the headphones.

I have tried removing the Sony bluetooth headphones and repairing it and also restarted the monitor. However the problem remains.

How to fix this annoying issue ?

[Anonymous · Accepted solution]

Good afternoon. I understand how frustrating this is. Have you gone in to the Settings>Sound>Sound Output and disabled the internal speakers?