Hate is a strong word, but I think your options are to deal with it.
It's funny, was listening a CD today (MP3's) and a buddy sent me a text message with a video.
I clicked the video and my music stopped and the audio from the video played.....so, it can do this.
I think when I use WAZE and listen to XM, the audio comes through too, can;'t say 100%, don't use it often, but pretty sure it does.
Google maps, dunno, never use it to navigate, find WAZE much better.