Got a new S21 Ultra a few days ago, and I am noticing some odd behaviour with my USB C headset.
The headphones seem to work fine with calls.
With media/apps - Often with the headphone plugged in, the audio comes out the phone's main speaker. Disconnecting the usb c and reconnecting it usually forces the audio to switch to the headset.
However, if I pause video/audio for more than a few seconds or switch apps the audio jumps back to the main speaker.
I do get an android notification saying "USB device not recognised" when it stops working.
i am considering to report the issue to the local consumer support centre CAB and see what they may help with. They should not restrict their devices to their own products only.It might be perhaps done something intentionally in order to boost their income. I would not say that this is not solvable problem. Definitely not for such a big company as Samsung. Most probably this is a software issue rather than a hardware compatibility. Headphones are commonly manufactured to be compatible with any major brands...