After applying the clipper, the measurements are marked on the hidden part of the model

They hang in the air because they are attached to invisible parts of the model.

<img width="937" height="1015" alt="Image" src="https://github.com/user-attachments/assets/153f5f58-e336-4e7e-b7f7-82a173b21d41" />

You can try it hier: 
https://360-for-you.com/projects/mOAW80LQ/ifc