I was playing a game: Large Galaxy, Tough.
While I was happily expanding my influence a Drengi planet (Class 18) switched to me. So I took a look at my newly acquired planet. What did I see to my enjoyment? A Precursor mine! What did I see to my amazement? They had built a entertainment center on it! Furthermore there was a 100% lab bonus square and they had built a entertainment center on this as well! It made absolutly no sense especially as the planet had just 5bil people and there were about 10 squares still open. Why do they built on bonusses first and then the wrong building?
It wouldn't be so bad as they didn't built on it but building the wrong building? Could this be a bug where the AI builds entertainment centers on bonus squares? Maybe others have also noticed that they build the wrong type of buildings on bonus squares?
The planet originally belonged to the Altarians so it could be them that build the centers.