Yes, the inventory definitely is bugged, sometimes it isn't reacting to button inputs at all. Sometimes you also can't pick up items and you don't know why while it drives you crazy. The game tries to put the item in your pants while the pants are full but you have an empty backpack but you still can't pick it up until you empty your pants, which wouldn't be that hard when you can move stuff from one inventory space to another but that's also not working...