[Autocomplete] styleOverrides not apply working for Paper

I have tried custom styleOverrides Autocomplete but I see it to work on the sandbox https://codesandbox.io/s/muiautocomplete-material-demo-forked-pv2ut?file=/index.js (apply both root and paper)

in my project with the same code

   MuiAutocomplete: {
      styleOverrides: {
        root: { <= work
          backgroundColor: 'blue'
        },
        paper: {<= Not work
          backgroundColor: 'blue'
        }
      }
    }

Does the current version v26 on npm match the sandbox?

[oliviertassinari]

@dohomi It should keep working. We have designed the migration from JSS to styled to minimize the amount of breaking changes.

[oliviertassinari]

#25102 was fixed before the release. This issue is about how the popup is portaled. It’s a different issue.