Hey Bao,
Could you please tell me your screen width in pixels? I will test further.
Please note also that in case there are numerous larger boxes and not enough smaller boxes, the masonry layout may have empty spaces left in it since it is mathematically impossible to fit everything into a tight layout; are you sure the items in question are still on their place and simply do not show up? Can you get to the relevant project item page by clicking the empty space?
Sincerely,
Andrew / Satori Studio