Why in the Grant in the created task ("serve") watch does not catch the change in the loess, while separately (grunt watch) works without problems?

Question

Grunt.js

module.exports = function(grunt) {
require("load-grunt-tasks")(grunt);
grunt.initConfig({
less: {
style: {
files: {
"css/style.css": "css/less/style.less"
}
}
},
watch: {
style: {
files: "css/less/*. less",
tasks: "less"
}
},
browserSync: {
server: {
bsFiles: {
src: ["*.html", "css/*.css"]
},
options: {
server: "."
}
}
}
});
grunt.registerTask("serve", ["
In this form, the browsersync is launched and the liveload works, the watch is launched, but it does not catch changes in the loess. And if you swap them, then changes in the loess are caught, and the liveload does not work.