that's normal for most beardies his age. If he wasn't like that, I'd say take him to a vet and see what's wrong with him. Our girls are about 3 years old and they love to roam outside and in the bedroom. We play 'find the lizard' upon occasion. Goldie was in the bed but we couldn't find her one day. We were scared that we wouldn't find her for quite a while. She's usually at the head of our bed (on or near the pillows) this day I went to take a nap and stretched out my feet and felt her under my feet. This was after we'd piled a lot of clothing on top of where we found her while we were looking for where she was. When I picked her up she gave me this look that said "what's wrong? I was in the bed!" then I told her we didn't know where you were because she wasn't in the part of the bed where she normally was. I believed she found a new place to hide and sleep and I was right, it just took us several hours to find her.
I do suggest you keep a leash on him, especially when you take him outside, it's easier to find them when something bright is on the end of their leash, especially when they go wandering to check out something new.
