I was producing an engine when two of my workers decided that they needed vacations. Okay, I thought, engine development isn’t time-critical. Let’s send them out. Then, since my founder had a fully-charged boost, I decided to train her at the same time.
As soon as nobody was working on the engine, it insta-completed. I loaded my prior save and was immediately able to reproduce this behavior by the same steps. I haven’t tried to create any software with the engine, yet. I will update this post momentarily once I finish developing my next game.
EDIT: The new engine seems to work exactly like it ought to. I’m going to keep playing. I’ll see if I can repro this again next time I make an engine.
EDIT: I’ve got clean reproduction on this bug. It’s easy to trigger and seems to work consistently.