Define API query parameter regression

[oliviertassinari]

🐛 bug report

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• [x] I have read the [Contributing Guidelines][contributing] for this project.
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Description of the problem

The query param described in https://codesandbox.io/docs/learn/sandboxes/cli-api#supported-parameters doesn't seem to work.

How has this issue affected you? What are you trying to accomplish?

I noticed because in https://mui.com/material-ui/react-switch/#color opening a codesandbox does no longer set the file in focus. The DX could be better

Actual:

Expected:

To Reproduce

It seems to be the same problem as in #8299. We noticed this in https://github.com/mui/material-ui/pull/43618.