Why does it blink?

[NESTED ERNEST]

Start the level:
If I am close to the red npc (custom npc) (as in the beginning of the level) everything is fine, but if the player moves away from the red npc it is off the screen but in its middle(image) just look at the "npc hands" you will see a blink(at some point).

Just wait a while and watch the npcs hand.

PS: The npc hands has the immortal check