That just means some heavy code is running without any call to the updater for Windows messages so as they are not handled until after the heavy code finishes Windows considers that as not responding.@Koshling or @AIAndy
Attached is a save. This is related to what I mentioned in the other thread, but actually a new issue that came up when hunting the other. In this one, check the food required to grow and number of turns it shows. Then do an Autoplay for 1 turn. For me, the city miraculously gets enough food to grow, bypassing the 13 some odd turns it should have taken. Strangely, this does not happen when passing a normal turn.
On a side note, I was playing this one in a Window vs Full Screen, and also noticed on Autoplay that the cursor often changes from the running man to the circle, and the window header at the top left says "Not Responding" for a brief moment. I haven't seen that before. Happens in both Autoplay and normal turn progression.
You can ignore that as it is not a problem.
As I am not at home I can't check the savegame but have you checked if you can change how your citizens are assigned to enough food income for that one turn growth?
And the other issue seems like correct behavior to me as BlueGenie pointed out.