Bug: top right piece border disappears on mobile

<img width="1170" height="2532" alt="Image" src="https://github.com/user-attachments/assets/291ea942-d9df-4e03-be67-1c5a30beba41" />
This happens to the pieces sometimes on mobile and I'm not sure why. It started happening when I added the transform for touch screens so the pieces are visible when dragging them on touch screens. 