Turn Skip With Cast At Start Of Battle

I’ve noticed that in certain situations it seems to skip the turn of my first creature when I have a spell cast at the start of battle. I’m not sure which of these elements may be causing it but in my situation one of my creatures was at the top of the action queue, my Mind Storm spell gem procs its cast at the start of battle and kills all of the enemy team, one or more of the enemies resurrect, and then it skips that first creatures turn and goes to my next creature on the action queue.