[Bug]: Nested CSS, parent is lost

[JulianCataldo]

What happened?

CSS Nesting is now widely supported

		<style>
			html {
				&[data-is-loaded='false'] {
					opacity: 0;
				}

				&[data-is-loaded='true'] {
					transition: opacity calc(1s / 3);
					opacity: 1;
				}
			}
		</style>

Yields (unminified):

		<style>
			&[data-is-loaded='true'] {
				transition: opacity calc(1s / 3);
				opacity: 1;
			}
		</style>

Enclosing parent is lost.

Version

7.2.0

What browsers are you seeing the problem on?

No response

Link to reproduce

No response

Relevant log output

No response

Willing to submit a PR?

None