I have a savegame where I just destroyed an enemy ascnesion starbase. When I try to move my constructor to build my own base, it just sits there and 'construct' gives me the normal options of military, economy and influence. It should automatically build a new ascension base at the location.
In fact, I just noticed another error:
I upgraded the constructor (while still on the crystal) to a Space
Miner. After completing the upgrade, an ascension base got build, but
instead of the base symbol, it now has the icon of a space miner in the
tactical view.
Both savegames are mailed to gc2bugs.
PS: I can even set the Space Miner Ascension Base to 'Automate'.