I'm not sure why developers would do this, but with an update about a year ago maps started automatically zooming out. So I'll be driving down the freeway with the map up showing me where I need to go, zoomed in to my location, and if you don't touch the screen it just randomly zooms out to show the entire trip. I have submitted so many requests I don't understand why they won't fix this I wonder how many accidents it may have caused already.
