I have a Hardy Pioneer near one of my settlements. None of the squares are developed; no roads, farms or lodges. The pioneer does not show in the menu any of the build options, nor do the keyboard shortcuts work. I can't figure out what's gone wrong? Pioneers on other settlements in the same game do work as expected. I have tried other units on the problem settlement also, and they behave in the same dud way. Anyone have any idea what is happening?