I was playing in the arena, in Plat, when a deck (a SNBow) played two Supernovae. I thought it was because I had SoSac active and 14 HPs so that, in a couple of turns if I kept chaining SoSacs I would have been killed but, instead, he had no Singularity. I wasn't sure if he really activated 2 Supernovae because I wasn't paying much attention, so I thought I misunderstood. But he did that again a couple of turns later.
The only thing I can think as influent here are that he had Cloak on the field (the first time, don't really remember about the second time).
If someone could check for me using the trainer both from their side and the opponent's side it would be nice.