colonization minister stops sending out ships

Some ships go long distances so I'm not sure if it correlates to that. It also does not help this situation to create ship yards as an empire expands outward so distance does not seem to be a factor.

This problem seems to be associated with the fact that sphere worlds have other problems associated with their exact location in space. If a colonizer is sent to the sphere world, it reaches the location in space but does not colonize it. Other ships can be in orbit around the sphere world and at different locations in the coordinate system. For example, newly built ships are at the center of the sphere world while other ships are at its surface. This is interesting, but it means that ships can not guard a sphere world since the enemy could attack at a different point. It also seems to mess up the ministers. Colonizers seem to flock around the sphere world as if all of them are attempting to colonize it.