Oh, interesting! We desinged it so that chars that go down drop their whole inventory to avoid this situation, but we didn’t consider that you could add stuff after they went down. Good catch. We’ll block that.
Those items aren’t completely lost, though – you can help up a downed character by sending another character to him. It will take 10 seconds or so, but he will help him back up with a minimum amount of health.
Maybe that “helping up interaction” is not obvious?