To reproduce: Enemy monster (a) hits one of my monsters, my valk scout hits back, and triggers a scourge of nature proc from a spell gem, this has extra target bonus.
The scourge of nature kills another monster (b). My next monster will be skipped without reason. also happens if the valk kills more than one monster due to procs.
So still some skipping left involving of-turn kills
Still getting the simple skip to at times, as in monster (A) attacks one of mine, my valkyrie scout retaliates, and kills monster (A). THe next in the queue is skipped after that.