This may be incredibly simplistic…  I imagine it has something to do with frustum clipping (?) but I haven’t found any online documentation yet.  It seems that objects (basic primitives such as Planes) disappear if they are at a distance of more than 2500( ish) from the camera in the z dimension.  I .  I have had done tests adjusting the distance and seeing it pop in and out of view.  Any info as to why this might be happening would be greatly appreciated.

increase camera far clipping: