Colonial Charter 7.6 Venison Bug
When the Old Town Market is built all the venison stored goes missing or is zeroed. IE I had over 2000 venison and when I placed the market all the venison disappears. Huh It's the Colonial Charter 1.76 Version
I couldn't duplicate this so it is hard to figure out why this would happen. Did you destroy some sort of storage/market before building the Old Town Market? Could it have been moved to a Trading Post? Have you checked your townhall stats for regular storage and trading posts?