Some cities producing 2 for 1 units
My cities have produced 2 for 1 units. Aircraft carriers, destroyers and modern armour. A few times.
I have looked around and cannot work out how this can be happening.
Perhaps it is the civics? +100% production. but then again, there is 50% production.
Maybe this is a bug.
Playing emperor difficulty. Have harbour and encampment districts and many cities.
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