Super Puff depuffed?

Hi guys! I recently washed my super puff for the second time since getting it three months ago. I washed it followed the instructions to a T just like I did the first time and that worked perfectly - now on this second wash for some reason one of the arms will not repuff for the life of me. I have tried absolutely everything, and followed the care instuctions exactly as they were bc I did not want to risk damaging a jacket that was 250 dollars lol. Has this happened to anyone? what could U possibly do to repuff that sleeve?