ARC interupts music without crossfade when notification sounds are on


I have been enjoying a lot the ARC functionality. I wanted to check if it would be possible to have crossfades when there is a notification sound from an background app on mobile phones? Now ARC interrupts the music on my android phone and resumes a while later. Another example is when driving ARC’s behaviour with spoken driving messages could be improved.
I hope this is on the todo list, because it somehow prevents me from using it on my phone with notification sounds etc.

Thanks a lot,