Has anyone had problems with the Ioniq EV audio system? Did a journey today with everything OK - radio and navigation sound good. Return journey, we noticed that there was no navigation sound and then realised radio was also silent. Tried Bluetooth from phone - also silent. The car makes startup and shutdown chimes - are these from a different sound system? Display of volume setting looks normal - ie not muted. Tomorrow I will look to see if there is a separate fuse for the audio amp. Otherwise it's back to the dealer under warranty.