EDIT:
So according to this thread, this is a Google related change and not Nvidia?
In which case, similar to the banner issue from a previous update, you can get a different launcher (see comments for FLauncher) to avoid it
https://www.reddit.com/r/ShieldAndroidTV/comments/181vh4t/ads_at_full_screen/
Same here, one other improvement I would recommend is remapping the Netflix button to something less annoying/more useful in case you press it accidentally. If you have Hue lights, you could make it toggle your lights with this app for example.
Nice find!
I’ll probably remap it to plex though, since my TVs ambilight already takes care of hue.