Connive/concoct is behaving weirdly when draw with Blue Sun Zenith.
Most of the times if work fine, but a few times I draw it with back side as main one, and a few others it’s front side got full mana, but the back one is empty.
I have seen this too but I don’t have a consistent way to reproduce. I’ve also noticed that you usually can’t exile a split card from your hand if it is flipped on the second side. You must flip it back to the first side, then you can exile it.