[Bug]: "Clear" / "Reload" button in CodeSandbox does not reset user edits to original sample code

Summary

Component: Interactive Code Sandbox

Steps to Reproduce:

1. Navigate to the "Treat state as read-only" section in the React documentation.
2. Modify the sample code inside the sandbox. Change:

position.x = e.clientX;
position.y = e.clientY;

to:

const p = { x: e.clientX, y: e.clientY };
setPosition(p);

3.Observe that the red dot starts following the cursor as expected.
4.Click the "Clear" or "Reload" button on the sandbox to undo the edits and restore the original code sample.

Expected Result:
The sandbox should revert to the original, unedited sample code (position.x = e.clientX), and the red dot should stop following the cursor.

Actual Result:
The red dot continues to follow the cursor despite triggering a reset.

Page

https://react.dev/learn/updating-objects-in-state

Details

まず react.dev/learn/updating-objects-in-state の "Treat state as read-only" セクションでリセット動作を再現し、次に Interactive Code Sandbox のリセットフローを追跡します。Clear または Reload で元のサンプルコードが復元され、赤い点がカーソルを追わなくなれば完了です。