Nested function style with prop not working as intended

[ccpu]

Expected behavior: Nested function style should apply props value to the rule, but it has no effect.

Describe the bug:

The props in the following function style have no effect on the rules:

 wrapper: {
    "& h1": p => ({
      fontSize: p.size,
      weight: 900
    })
  }

Codesandbox link: codesandbox.io

Versions (please complete the following information):

• jss: 10.0.0-alpha
• Browser [e.g. chrome, safari]: chrome
• OS [e.g. Windows, macOS]: Windows

[Hristijan95]

Any updates on this? It's still not working...