That's not a problem, that's not understanding how it works.
Any nested SCSS is impossible to reuse outside of its parent scope. If someone is using nested SCSS and expecting to reuse that code elsewhere then they are doing it wrong. It's the same problem that exists if one were to create a class as a child of an ID and then expect to use that class outside of the ID's scope.
Any nested SCSS is impossible to reuse outside of its parent scope. If someone is using nested SCSS and expecting to reuse that code elsewhere then they are doing it wrong. It's the same problem that exists if one were to create a class as a child of an ID and then expect to use that class outside of the ID's scope.