Linux Bluetooth Connecting to wrong device

[mcourter]

I am seeing all my active devices in the Bluetooth connection list, but when I click to connect it shows connected to the selected device, but the sound comes out on another device. For example, my wife was hearing the music I was trying to play on her treadmill. Not good.

[infirit]

Blueman doesn't control which audio to use. This is something handled by PulseAudio/Pipewire. If the device connects properly it's best to ask on the support forums for your distribution.