try to connect more than 2 devices simultaneously on your mac and "enjoy" the sound you get then. I had this problem with either intel or m* mac and it seems from a search on the Internet that it is widespread to the point that is the normal. Nowadays I only use dongles for mouse+keyboard+headset to avoid such issues, at least the usb-c ones are quite bearable on size you just need to be careful how you put your laptop in the bag, which way up.