I recently have a TEC SB built in an Advent occupied system. The SB has been upgraded to level 2 on the frigate/cruiser construction.
I can build frigates just fine, but it does not seem to want to build cruisers at all. I had 5 percherons queued and put it to 8x speed and nothing got built.
I do have a save game available if I need to send it somewhere.
