The weirdest thing just happened to me. I was playing a scenario I had made, where I had made the Great Library never go obsolete. I was one turn away from researching synthetic fibres when I captured an enemy city which had the Great Library in it. The next turn I got synthetic fibres as I was supposed to. Then it said "We have acquired <some tech> from the Chinese and the Maya". After that it said "Sire, our think-tanks have mastered the secrets of <some other tech>", then "We have acquired <some tech> from the Chinese and the Maya"... And so it went on and on until I had gotten all remaining techs. It must've been at least 6 or 8 techs or something that I got at once. Is this a known bug?