Ok. Lets see if you have any pulseaudo packages left, what are in conflict with pipewire.
Look if you have anything installed from what he mentions and install the packages.
There is a topic already about the same symptoms like yours.
Else, what i have found on the net, its maybe a linux-firmware related problem.
Edit: Another thing what i observed today is interference with other devices.
I managed it, to disconnect my headphones today with an electrical toothbrush.
Mobiles and Wlan work on the same frequency ranges from about 2,4Ghz.
I found an article where it says, to avoide channel 14.
But i could figure, that other devices can interfere with the headphones or receiver too.
Or an dying battery can cause disconnecting too.