As I am sculpting, parts of the mesh will start to get these weird lines (or just overall deformations as if they dont react to brushes) and wont sculpt properly; they get glitchy and then darken and become more geometric if I go over it more. The first time as I used the undo button, the first picture completely deformed and randomly developed holes! The second time, the issue started in a different area. Has anyone else had the same problem? I'm following a tutorial, and the mesh is clean.