I had these too, even though I have power nap disabled. But given how horrendously buggy the whole power cycle thing in Macs is I am not surprised. I've seen it after coming from sleep completely forget all display configs, freeze cold, switch displays, refuse to connect bluetooth devices until I remove and re-register them, and so much other fun stuff. So just waking up and wasting a ton of battery is par for the course. The whole sleep thing is deeply broken there, and since there's no transparency there's no way to see even if it's "sleeping" or just staying up and heating itself up.