You have also installed the 4.4.1 update right?
And your using the 1.6.9 exe to host from, you can only play with the 1.7.x exe not host.
Im not sure how it works if you serve and play, our server runs in serve only mode, like all aw2 servers it does take much longer to load the next map compared to the stock mods due to the massive number of additional assets in aw2.
Also when you say you cleared the cache in "Tphoon rising AW2" the AW2 version does not live in the the "Typhoon Rising" folder, its in its own separate folder completely as its essentially a stand alone version of the game. Although the cache folder as far as im aware is only caching the assets used for login and the lobby and would not have any bearing on the map loading issue.