FIX: Slider notch unrounding not working due to class reroll

## Before <img width="494" height="139" alt="Before" src="https://github.com/user-attachments/assets/8992dc19-bca0-4145-ab99-13302d786091" /> ## After <img width="494" height="139" alt="After" src="https://github.com/user-attachments/assets/3f6c40e3-abd4-43d4-ace0-46b21ff91c48" />