After Catalina Update Bluetooth Headphones Turn Off Randomly
I had the same problem.
I did everything that I found within the different communities and blogs, finally, I find out that there is something between Whatsapp and Bluetooth. I uninstall WhatsApp and never use WhatsApp web again and problem solved.
I hope it can help in your case too until Apple figures out how to fix it.
As you have already deleted .plist file , you can try the following option.
Reset NVRAM
- Shut down your Mac device.
- Press the Power Button.
- Before the grey screen appears, press the Command, Option, P, and R keys all at the same time.
- Continues pressing the keys Mac restarts and a startup sound can be heard for the second time.
- Finally, release the Four (4) keys: Command, Option, P and R keys.
Your Bluetooth should work as expected after that.