My hamster takes naps

So i got a hamster for free of marketplace few months ago. Everything they had for him was wrong. I got him new food, bedding,cage, etc. Anyways fast forward to now 2 weeks ago he started to take a couple 15-20 minute naps every night usually around 12am and 2am. Tonight he went for his usual nap around 12-12:30am but i noticed he was sleeping for long than usual. I held him and gave him some pets which always wakes him up again so he’s active but when i did that and put him back he just went back to bed. Around 3:20am i decided to try again but this time let him run around a little bit and that seemed to have woke him up because he back to his active self. I guess im just wondering if this is normal for hamsters or if i should keep an eye on him? Here’s my sweet boy🥹