How late are you feeding him? If you are feeding him late, or shortly before his lights turn off, that could be an issue as well. They should eat earlier in the day so they can bask (which helps them digest), and move around to digest that food they ate and by the time they go to bed they won't have anything not fully digested in their bellies.
My boys lights come on at 6 am, and gives them time to wake up and start to move around by the time I leave for the day. I give them their food of choice (silkworms, crickets, hornworms, superworms....) and dusted with the appropriate supplement for the day. Fill their drippers up (which my one eagerly waits on me to do), check the mister (clean water) bucket to make sure it's full, and I leave for the day. By the time I get home around 4-5 pm, they are already beginning the "hunker down" phase. Their lights go off at 6:30, I cover their cages up and night night they do. Even when I worked second shift (3-11:30) I kept them on their same, no I didn't get up at 6 or anything, but I would wake up and give them their food and water and go back to bed, lol..
You are getting wonderful advice, and I'm glad to see you taking it with a open mind. Many people get offended and upset easily. Jann B is the veiled chameleon QUEEN! She could give you wonderful advice about your little guy.