As can be seen during today's msfsofficial airshow, multiplayer/AI planes are culled too early at long range if the camera zoom is high.
Based on hours of experimental evidence and assumptions:
Objects/nodes are culled based on their screensize without taking camera zoom into the calculation, as if the camera is at 1x zoom. When zooming in using the drone/showcase cam this causes planes to go invisible at quite short range while they still fill a large portion of the screen. For a jet fighter sized plane this distance is roughly 2km.
The workaround for this currently is to make every object of the plane giant by joining them with invisible boxes, giving visual range up to the multiplayer limit. (30km+ for AI).
See the Thunderbirds demo in the show for an example of this workaround working.
Please make the screensize for object culling use the actual screensize and not the 1x zoom screensize.