To add into this a few bugs i've had from reloads and loading up saves.
-All Water disappears.
-None revealing fog of war.
-Crazy Pathfinding(only had it happen once might of been a different glitch)
-Info bar above cities disappears.
-Technology connection lines disappear.
-Growth resets for a turn. This one I am not sure if its just visual or if it actually gives you the growth for that one turn.