When buying food from the NPC Jun Kamisato it's come to my attention that you can't switch your inventory slot while the buy menu is open. For instance, when I buy a chocolate croissant from the NPC and then navigate down to say 'Goodbye' when I right click it also consumes a food usage from that item. To prevent this, I tried to change my inventory slot but it automatically brought me back to the chocolate croissant. My suggestion is to either allow us to change our slots or put the items we buy in another slot so we don't accidentally consume our food when our hunger is full. 

Accepted

Thanks for bringing this to our attention. After we changed our eating/drinking system to avoid insta-consuming items, this should no longer be possible.