He’s probably trying to pick up new skills, and sometimes the previously learnt skills take a backseat for a while. As long as his hearing is intact, responds to sounds, and is otherwise well, he should be alright
4 month old shouldn't be able to recognize his name yet and maybe he's busy playing or distracted with something else, they have different moods too. As long as it's not prolonged I think should be no concern
Hi... I think it’s normal. But if you’re worried, please bring your child to see a doctor or pediatrician
Could your baby be not feeling well??