gulp sourcemap does not work correctly

Hello. Unfortunately, for some reason, sourcemaps works completely incorrectly and indicates the line number in the css file, and not in the scss file, as a result, the meaning of this module is completely lost.

The task looks like this:

gulp.task('sass', function() { return combiner( gulp.src([ 'dev/scss/main.scss' , 'dev/scss/project_components/**/*.scss' ]), debug({title: 'src'}), gulpIf(isDevelop, sourcemaps.init()), sass( sassOptions ), gcmq(), autoprefixer({ browsers: ['last 4 versions'] }), rename(function (path) { path.dirname += '/css'; path.basename = 'main' ? 'style' : path.basename; }), gulpIf(isDevelop, sourcemaps.write('.')), gulpIf(!isDevelop, csso()), newer('app'), gulp.dest('app'), debug({title: 'dest'}) ).on('error', notify.onError(function(err){ return { title: 'sass', message: err.message } })) });