Busy mouse icon on first run

Currently in sourceacademy.org when I enable conductor and I run a program using "Source §x" for the first time, the mouse icon remains "busy" (spinning ball).

<img width="505" height="369" alt="Image" src="https://github.com/user-attachments/assets/467a50b1-5ad0-4cb3-a320-9ddb62163def" />

This issue disappears when I run the program again.