I agree, my male Panther was doing that around the 5 month old mark, then it was into the big flexarium. He's been in there a month now and he seems much happier.
How big is your cage, did you say it was glass? Now that he's getting older he'd be much happier in a mesh type cage.
Do you have any furry pets running around the house? This could be the reason he was awake and so keen on escaping at 4 am.
My cham sleeps much more soundly now that he's in the bigger cage and can choose a higher sleeping place, I have 2 dogs 2 cats. Before he could only get about 4 feet off the ground, in his new cage he can go as high as 6 feet.