it's about time he starts to also understand that he doesn't always have to leave his chewing to check out what we're doing
It doesn't happen often, but I agree with @tanza on this. He's a baby and it is pretty "normal", but also remember that dogs are pack animals. You, your significant other, and the pup are now his "pack". If you are in another room and he comes to look for you, I would suggest just ignoring him. If he comes to you, give him a pet and go back to whatever you were doing. He will either go back to the room he was in, or settle down somewhere in the room you are in. Both of which should be acceptable. This is something that may be less frequent as he gets older, but probably never disappear entirely. Which is a good thing, I think.