AI- FREEZES WHEN UPGRADING METROPOLIS
Twice the game has stalled completely when it's the turn of an AI to improve a city to a metropolis or to add the 5th card to a metropolis. The last game was originally a player who was replaced by AI when he left, but I think the first time I was playing a singleplayer game.
@daysky hanks for the feedback. This issue should be resolved in the upcomming update.