I'm having a problem with my sims (customers) pulling food from their personal inventory at the tables while waiting for their food to be served.
It seems like if they have food in their inventories they will pull out a serving even if their hunger is in the green - so it's not like they are starving while waiting for their food.
I initially had some of the other mentioned issues; therefore, I diabled Mods & CC already and so far this is the only glitch that I've noticed. I'm only using the Maxis built restaurants.