Novamark works poorly

I am using Runegraft of the Novamark with Voltaxic Burst. When mark is attached to enemy, Voltaxic Burst spawns beneath that enemy, but not attached to it (probably expected behavior). When mark is removed by any means (other curse is cast or enemy is dead), Voltaxic Burst again is cast on the place of player character, but is not attached, so it blows up where you casted it (turning it into weird self-detonating landmine). Any loading screen fixes that issue, attaching Voltaxic Burst back to the player character.
Expected behavior: after mark being removed Voltaxic Burst should attach itself to the player again.