Somehow often I have issue with my soundcore Space Q45 headphones that if I connect them via bluetooth, sound quallity is very poor, and if I try manually change audio mode to high fidelity, I was receiving this error message
Failed to change profile to a2dp_sink
after some search I found out fix that worked for me - reseting bluetooth Kernel module.
sudo modprobe -r btusb && sleep 20 && sudo modprobe btusb