Forked sandbox, edited the fork - now the original has changed to match the fork

[Nantris]

Original: https://codesandbox.io/s/optimistic-meadow-95x4i9?file=/src/App.tsx Forked: https://codesandbox.io/s/confident-rgb-1uq14j?file=/src/App.tsx

Modified only the forked sandbox, but now the original is mangled