Have you had success with phone chargers? My RPi4 is very picky about power and is unstable on anything but the official power supply.

Jeez, were one of the two devices 10 years old? That hasn’t been my experience for a long time (except the duplex audio issue. I can’t believe it’s still terrible.)

Then again, I mostly use BT for the convenience. Being able to do yard work with zero wires is amazing.