I have a bluetooth audio receiver in the home office, bt in my car and bt headphones and none of it has given me any trouble. Just works. The only issue I have

I have a bluetooth audio receiver in the home office, bt in my car and bt headphones and none of it has given me any trouble. Just works. The only issue I have is which phone the car decides to pair with when we get in to go somewhere together. Oh, I guess we also have one of those bluetooth battery powered speakers for taking to the park. It works fine too. I connect to the bluetooth audio receiver with my linux, mac and windows laptops on an almost daily basis, no problem. What problems are you running into?