Surface snipping is slightly off the BZ

<img width="732" height="721" alt="Image" src="https://github.com/user-attachments/assets/7cbbb955-3cca-4828-9ab3-4582115511b8" />

The snipping seems to slightly off the BZ, might be an issue on the data pipeline (in which the padding function has a bug) or the with the snipping itself.