Camera shy baby

Az

So I'm coming up on 32 weeks and my son moves constantly, my stomach is a wave pool. BUT, literally every time I pull out my phone to record his movement he just stops or only gives tiny pokes. I wait and nothing, as soon as I put my phone down - he goes back to his dance party. It's like my body signals to him and he refuses to be taped. Am I the only one who this happens to?!