If you're dealing with the new Lvl 5 AI, or with certain other cards, it can appear as though you won a spin when you didn't -- because you spun up a couple of unupgraded cards along with one upgraded card with the same art. It looks the same on the spinner, but you don't win anything from it.
Unupgraded shards -- 2 different cards with exactly the same art and text -- have the same problem.
Essence