When you have dialog with spirit and background smoothing, the spirit NPC smoothing also,
Here screenshots:
https://steamcommunity.com/sharedfiles/filedetails/?id=2833250250https://steamcommunity.com/sharedfiles/filedetails/?id=2833250282so if you move camera left or right while dialog, smoothing changes also, you can see other parts of NPC look, where background sharped, and cant see, where background smoothed.
This bug for every spirit NPC, not for exactly on screen one.