Yes. And the volume is never equalized. It’s very low and when you disconnect you get blasted by the terrestrial radio.
I also hate that it stays connected via Bluetooth even when your not listening to your phone. CarPlay is hot garbage
there is a setting in iOs called S
ound Check. Turn it OFF. This should increase your volume when playing music and should help maintain volume levels when changing from iPhone to radio. It made a huge difference for me.
Settings>Music>Sound Check
To improve music quality check Settings>Music>Audio Quality be sure to enable lossless audio and change the cell streaming, 5G & WiF and downloads all to Lossless. All of my settings were set as "high quality" when I changed to lossless the music quality improved Note: lossless files are larger files.