I don't know - I think he loves his environment and he is testing the boundaries of it, as they often do trying to climb walls and bars - maybe as they grow in confidence and feel secure in their cage, they might want more. With our first robo I was a bit nervous to try and tame him and he seemed happy in his cage and he was well over a year old before I finally got him out during a cage clean and thought I should try and do a health check. Once I'd done it, I wished I had done it earlier. I sat in the playpen with him and he ran up my trouser leg ha ha. And climbed over me - I was just part of the furniture. While doing that I was able to pick him up as he walked past me. I was nervous about that and thought he might wriggle free and I might drop him but he didn't Once held he was very still and just let me stroke his tummy. I am not sure if they are all like that. They run fast but maybe don't ping like Syrians do.
He used to be awake for a short time in the afternoons so it was a good time to do his cage. But I would have woken him up otherwise as it needed doing! Like when you have to go to the vets although I always tried to get a vet appointment as late in the day as possible.
I was so nervous taking him to the vets as he wasn't hand tame and I worried he'd run off the vet table and fall on the floor (I've heard stories like that) so I took a low height storage box with me with hemp mat in the bottom and a cardboard tunnel, a hide and flying saucer and a bit of food and put that on the vet table and let him walk from the pet carrier into the box. He was quite happy in there and ran on his saucer and nibbled the food. The vet managed to get a good look at him like that as I didn't want him freaking out by being picked up from the pet carrier. She did have to pick him up but it was easier from the box and meant he had a nice hide and some food and his saucer after the humiliation of being handled by the vet! It worked really well.
How old is he now? Pip seemed to just love his cage until he was about 9 months old and then he seemed to start getting a bit bored and I thought he wanted to come out. Once he'd been out he wanted to come out again. I only managed to get him out the first time because he needed a substrate change at one of the cage. The half under his house. This brought him out to keep an eye on what was going on and he investigated a mug I put near the bottom of the cage where I had taken a lot of substrate out and I took the opportunity to pop my hand over and take him out. I'd already thought I might do that if the opportunity arose so had the playpen up already.