Before anyone jumps all over me about this I did test it. But the fixes conflict with the food and drink stand. I had to take all my mods out to determine which one was causing the problem and the fixes are the one that cause it to not have a food menu show up. If anyone can get it not to do that I will add them back in.
I think I have this same issue. The IP food stands and also the seasonal fair food stalls don't work for me. My sim will chat with the food stand worker and then just drops the action without the food menu popping up. I observed this with only Overwatch and the store fixes installed. It's a minor issue for me so I haven't tried anything to fix it besides deleting cache files.
hey I downloaded the "shop from inventory" mod from MTS and it fixed this issue for me http://modthesims.info/d/409607