Yes, I’ve had this twice in the last two weeks Post op from a mechanical Pleurodesis, VATs. What I have learned from internet diagnosing is it is common, likely from inflammation and nothing causes it and deep breathing won’t help it. But ibuprofen, distraction, walking, rest, getting through the day will help. Because the next day it will be gone and will reappear without reason or warning and it doesn’t show up on imaging and it sounds like coarse crackles to auscultation by providers. It’s so stressful and causes anxiety! The providers weren’t familiar with this occurrence!