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I keep encountering a bug where allies or enemies will do nothing but set workers to carbon.
They wont build farms, they barely mine, and they wont build any military besides a few troopers.

I tried a 4v4 AI match and all my allies did nothing but harvest carbon. Two of the enemy empires proceeded to spam artillery and were met with absolutely no resistance, but the other two enemies were inert.

I'm not sure what is going on here, there seems to be a random chance that the AI will either build dozens of farms and produce units like mad, or they will just harvest carbon and never tech up.