Vanishing clockwork

[srmalloy]

In Atlas Park, at [2124.4 -0.0 -1463.0], just south of a tree in the grassy area just to the east of the wall dividing Argosy Industrial from the rest of AP, there are two Clockwork that you can spot at range, but which fade out as you move closer, disappearing completely, only to reappear after you move a sufficient distance away.

[Greycat]

Have to look. Are you entering one of the phasing areas? You can lose NPCs there.

[GraspingVileTerror]

Yup, sounds like.
There are two areas which "phase."  Roughly, on the following map, the blue highlighted areas along these lines:

 

Would that be the area you lost sight of the Clockwork, @srmalloy?

[srmalloy]

No, the location where the disappearing Clockwork are is NE of your blue area, in the grass area that sticks west into the Argosy Industrial area -- the NW corner of this area:

What makes it weird is that there is a spawn of Clockwork at the south end of the grass area that doesn't vanish -- so if it were a simple case of the tree and the Clocks under it being in the phased area, the ones to their south should be, too.