For some reason the device is outputting 3840x2160 UI with an interlaced appearance. Actual media is seemingly not affected, thankfully.
If you run the UI in 1920x1080p and your media is 1920x1080p or lower, no issue. If you run the UI at 1920x1080p or 3840x2160p and run 2160p media, the UI appears interlaced. That means anyone with a 4K TV will experience this with 4K media.
For my setup I need to run the UI at 2160p due to a limitation of Samsung’s flagship Atmos soundbar, so for me all the posters, artwork, UI when navigating Kodi are all pretty ugly.
Here’s an example. First image is Vero 4K+, and second is Vero V: