It seems as if the sector control AI has changed at some point and will now only approach to almost exactly 35m from sector module, they seem to ignore the linked triggers size when they used to abide by it.

This means that to get my missions working again I have had to up the size of each trigger to at least 36m, and sometimes that still is not enough. It makes smaller scale sector control very difficult in places like cities,

I used to be able to make a small area trigger on a road and they would go into that road. Now they could be on any road in that 36m radius.

If any devs are reading, please look into whats changed here and see if they can be made to approach either closer to the module, or adhere to the trigger area synced to it.... however it was a couple years ago :)