I have never see this before, and not sure if it is related to the Oreo Beta, or a new feature of Google Maps, but when using the Navigation while driving and then pressing the Recent Apps button on the Nav Bar, it now so shows the Navigation in a smaller window in the screen over top of the other apps. Is there any way to have it like it was before, running in the background but not displayed in a small window over other apps that you open?
yeah, it is an Oreo feature called picture in picture. You can tap the little window and either expand it or put it in the background with the X in the upper right corner. Not sure if can be disabled completely though to where it doesn't do it at all.