Stylelint bug

.stylelintrc.js

module.exports = {
  extends: 'stylelint-config-standard',
}

package.json

{
  "private": true,
  "dependencies": {
    "stylelint": "^7.6.0",
    "stylelint-config-standard": "^15.0.0"
  },
  "scripts": {
    "test": "stylelint test.scss --syntax scss"
  }
}

test.scss

.foo {
  color: black;
  background: {
    size: cover;
    position: center;
  }
  padding: 10px;
}