Functions showing as "unknown" when encased in parentheses

I have a prop that is defined as propName: (() => string) | undefined and the function portion of it is showing as "unknown" for the tsType

Minimal input

interface Props {
  name: (() => string) | undefined
}

const MyComponent = ({name}: Props) => {
  return <div />;
}

Output:

[
  {
    "description": "",
    "displayName": "MyComponent",
    "methods": [],
    "props": {
      "name": {
        "required": true,
        "tsType": {
          "name": "union",
          "raw": "(() => string) | undefined",
          "elements": [
            {
              "name": "unknown"
            },
            {
              "name": "undefined"
            }
          ]
        },
        "description": ""
      }
    }
  }
]

Tested on v8.0.0

Reproduce the issue using the provided Props interface and MyComponent example, then inspect how the reported tsType is produced for the parenthesized function type. Done means the function branch is identified instead of reported as "unknown" while the union still includes undefined; no file or test path is named in the issue.