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/
I occasionally see auto-playing ad on my Chromecast with Google TV about twice a year so far. Every time I hit Send Feedback immediately and say something harsh about the ads and they disappear shortly after. I’m considering building a LineageOS Android TV machine based on the ODROID-C4. I’m just unsure what level of Widevine I’d get. I’d be okay with 1080p. 720p would be a bit shit. Anyone tried this route?