Comment 9 for bug 895047

This only happens if the structure in question has a dock, like a service depot. IMO this is not a big enough issue to bother fixing, and IMO it's a good thing that you can service-depot-repair your aircraft.
Internally, every building has at least one dock, positioned in the dead center. They might not be able to use it, but internally it's there, and can be used for this glitch.

That's not a bug... that's the chrono guy trying to get as close to an inaccessible unit as it can. Well the chrono guy doesn't need to get "as close as it can", he's supposed to have a teleportation device for that. But westwood actually coded him to pathfind a way to the target instead of just jumping there, hence the bug.