If you are hungry, you should eat. DO not question that feeling, just eat. DOn't eat sloppy crappy stuff, but definitely eat. As long as you don't get acid reflux or whatever at night, no big deal. But, keep track of your food.
What you may discover is that this pre-bed hunger is temporary as you adjust to the new work load, or maybe you just start to eat more post workout and it goes away that way, or maybe you start waking up in the middle of the night even more hungry, who knows? See what happens. But whenever you are hungry, eat good whole foods, even in the middle of the night.
Over time, if you notice too much fat, cut down carbs and salt. If not, just watch your muscles grow with all the new food they get to use now that you're eating above maintenance. haha.
I personally don't buy into this digestion slows down at night stuff, btw. I think we digest BETTER at night because it's human nature to want to lay down and sleep after a good meal late in the day. I can't believe we evolved that way over millions of years if it weren't in our best interests!
At night is when all your hormones are racing around getting all their work done and I seriously doubt food in your tummy is any concern to them at all.
No studies to back that up. Just my personal opinion.