Hello, we have the following option in the Blizzard UI.
https://i.imgur.com/MuMeDiX.png

This is option is not working correct with the "Name only view", for example here is the view with the Blizzard UI. I see only the "Flugmeister-NPC" on the left side and the "Schmied-NPC" on the right side.
https://i.imgur.com/urguqst.jpg

Here is the same with the "Kuinameplates / Name only view" active. I see two more "garbage" NPCs which i dont want to see.
https://i.imgur.com/IRUCYCE.jpg

If you can fix this, it would be great.

Regards
pexlar

That option affects the old floating names (visible in your second screenshot), not nameplates. The game decides where nameplates render; addons can't arbitrarily hide them. So the only way I could "hide" these is to make them invisible, which would leave an invisible click-box, which is a bad UI experience.