King of Thieves Gem spinner

So when I'm playing and trying to steal someone else's gem, with 2 stars (about 35% chance), I don't get it. Then it gives you an option to re-spin. I spent 75 orbs to re-spin 4 times, and all 4 times they land in the same general area! (like within 5% of the circle). That makes me wonder, is the spinner time based (can I time a re-spin to maximize my chances) or is it purely random based off of other people's spins and an algorithm?