Bf lying

Ok so my bf and I have rlly good communication. He’s really sweet and thoughtful. Always doing everything right and always treats me well. He’s always extremely honest. However , ive noticed something. He says that he’s taking a nap but he’ll actually play video games instead (i can see on discord). He disappears for awhile through the day for hours and then says it was a nap but it was actually the gaming. I think this is a really innocent “lie” but idk why he has to in the first place:( maybe he’s embarrassed bc he plays so much??? Idk:( should I b concerned? I don’t rlly care about it but I just want your opinions.