Hidden Gifts Problem

It is clearly that not all hidden gifts work well, all instant serving dishes are ok and most of cookbook dishes can not make as a gift. When we gift Sweet Sugar Cookies to our friends, we can see this pop up “Here is a shipment of Sweet Sugar Cookies! Serve this gift in your cafe, and customers will pay 5 coins each! Can you return the favor and send me a gift back?”. Now we choose Tostada de Carne Asada, check the pop up “Here are servings of Tostada de Carne Asada! Serve this in your cafe, and customers will pay 2 coins each! Could you help me by sending a gift back?”

Do you find something different? Yes, there is no amount before the word “servings”, so that is why our friend click the dish they received in the game but nothing happened.