Hello!
I have a 2016 RX350 and a Galaxy S10 phone.
No problems sending and receiving calls via bluetooth.
But other apps cannot connect to use car's audio. For example, if I turn sound on in Waze, I can hear instructions until the phone connects with the car's bluetooth--then silence.
I'd be grateful for any suggestions!

 

Never mind: figured it out.
Just had to set audio Source to Bluetooth/