I never had any issues with the orginally and the first patch on this sieging of cities bug. Now that I have put in the last patch this issue shows it ugly head. I think it is pretty simple: they fixed one issue and created this issue. Now they say that the AI has changed its mind and wants to move the resources some place else. I have news for them I did the save game I was Seleucid and two of my cities were being sieged by Egypt. After I restarted the game the Egyptian left my cities and came right back in the same move. Now did they change there mind and than said no go back to the city!!! I can't see Alexander doing that at the sieging of tyre.