The only issue I have noticed in 17.4.0 and 17.4.1 is CarPlay app lock up.
When launching or switching to a CarPlay app, it will simply lock up for a minute and quit to the SpringBoard.
It’s really annoying, but nothing more.
An example of a lockup. The app was not responsive; you can even notice the sidebar be in a different colour scheme from the app.
View attachment 133686
Another issue that has been present with the iPhone 15 Pro, that was absent on the iPhone 11 Pro on the same iOS version, is that it will not playback audio when it is connected over Wireless CarPlay while connected over USB type C.
The workaround is to disable Wi-Fi on the car, reconnect and re-enable Wi-Fi.