I had one of these pop up in Android Auto earlier while I was driving. I'd used the Google voice assistant to change the destination I was navigating to, and a few seconds it threw a feedback popup over the top of the map, obscuring the name and distance to the next junction. Very annoying and distracting, potentially unsafe since I was going around 70 mph while surprised by this.

It should at least wait until I've finished my journey and parked up. Not that I'm going to bother giving ad hoc feedback then either.