baby clothing sizes

I’ve asked a few times when my baby started crawling if they went down clothing sizes or diaper sizes when babies started walking and everyone said no!! but i’m here to tell yall my son was in 2T fully while crawling, he started walking 3 weeks ago and now he fits in 18-24m comfortably! ofc this is temporary but that’s definitely a drastic change 😭 now he can wear some of his cute old outfits again