Why does the Codex sandbox stop execution early even when my script is within time limits?

[ghost]

When running Python scripts in the Codex sandbox, I sometimes see “Execution stopped” even though the script should easily finish under 3 seconds. The script mainly performs NumPy operations.

I’ve confirmed that:

• No infinite loops
• No excessive recursion
• No huge I/O
• No sleeps or waiting

Why does the sandbox kill execution early, and is there a recommended workaround?