Bullshit. My Bluetooth in my truck is a cheap cassette receiver. However it’s worked forever like this. My CD player plays with both speakers. With Bluetooth, Some days my left side is playing, some days the right. Same with my ear buds. Only one at a time works. It’s aggravating. Since I’ve got a new iPhone pro max this has been a problem. With my truck and earbuds. $@$* is annoying as !&&*.