Will Sector-Administrated planets ever upgrade their Colony Ship?

I threw one of my colonial planets into a sector in a recent spat of colonizing, since I needed more, newer, planets in my cores!

Today, I looked back at it, and... well...

Plenty more than 5 pop, and still rockin' that Reassembled Ship Shelter.

Since upgrading costs influence, is it even possible for sectors to upgrade this themselves?