Sourcemap for styles is not working correctly

[Nikolasgrizli]

Test conditions:

1. clean build
2. test styles are written for .test .test2 .test3 elements in header.scss, footer.scss, main.scss files

Expected:
when .test element is selected in developer mode ( chrome and ff ) the source of styles should be header.scss; .test2 - footer.scss; .test - main.scss

Actual behavior:
When selecting any test element, the style source is one - main.scss, clicking on it takes you to the last line in main.scss.