Right now if you create a dialogue where some buttons are hidden, you cannot have it displayed following another dialogue using the component complete trigger. If you try, it generates an internal genesis system error. However, you can display the dialogue using component complete off of an interact.
Dialogue State Trigger- Component Complete - Blablabla Dialogue: Internal Genesis System Error
Dialogue State Trigger- Component Complete - Interact With Planet (Ship, etc): Works fine.
A dialogue without hidden buttons can follow another dialogue via component complete, but once you have conditional buttons it can no longer due so.
This is a pretty severe limitation as it prevents you from showing a pop-up that displays secondary objective status.