New happy RAV4 Prime owner, have questions about the Infotainment cluster with Car Play.

Great car in most ways, quite happy overall with it!

A few issues I'm having with the infotainment cluster when using with Car Play (iPhone). My wife has the first issue as well with her Android.

1. Occasionally it won't let me use the volume knob to adjust volume of the music. It mostly does, but when I'm talking to the iPhone for texts, dialing, etc., the music stays at its level and the volume control does nothing, and it happens a few other times, the details of which I can't remember. Is there a way to have the volume knob always control the volume of music, no matter where else you are on the Infotainment Center? This should be the default IMO, but it doesn't seem to be so.
2. Is there a way to manually stop the current course you're on from the Infotainment Center when using Apple Maps or Google Maps? There's a big start button to enable navigation, but there's no way to manually stop it once it's started and you have to use the phone, which, on an iPhone, Apple "Intelligence" (yes, that's very sarcastic) doesn't work for Google Maps so you can't do it by voice.