You are cursed to always respawn where you died, a short time after you died. It will also pull you from Limbo within fourteen and a bit seconds if you don't redie in that time.
The curse can only be lifted in two ways: First, preferably, by killing the other who was cursed at the same time as you; secondly, by being killed by said person. Fortunately that person is certainly on the same world as you and will undoubtedly make a huge commotion simply by being there.
The curse is a secondary effect of your Ace of Spades ability, which teleports yourself and an enemy to a random planet (and also causes a /rather large/ explosion) and administers the curse to both of them until one kills the other.