'npm run watch' endless loop of rebuilding css

• Laravel Mix Version: laravel-mix@4.0.14
• Node Version: 10.15.0
• NPM Version: 6.4.1
• OS: Windows 10

Description:

Trying to compile an scss file, the watch task will build the css over and over multiple times per second.

Steps To Reproduce:

webpack.mix.js

let mix = require('laravel-mix');
mix.sass('resources/assets/sass/test.scss', 'public/css');

test.scss

@import 'test2';

@font-face {
    font-family: 'Open Sans Light';
    src: url('../fonts/open-sans-v15-latin-300.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

_test2.scss

/*
A
*/

Result:

 10% building 1/1 modules 0 active
webpack is watching the files…
98% after emitting SizeLimitsPlugin DONE  Compiled successfully in 1620ms12:08:58
Asset       Size  Chunks             Chunk Names
                                                     /css/test.css  204 bytes     mix  [emitted]  mix
fonts/open-sans-v15-latin-300.ttf?177cc92d2e8027712a8c1724abd272cd     27 KiB          [emitted]
 WAIT  Compiling...12:08:58

 98% after emitting SizeLimitsPlugin DONE  Compiled successfully in 33ms12:08:58
Asset       Size  Chunks             Chunk Names
                                                     /css/test.css  204 bytes     mix  [emitted]  mix
fonts/open-sans-v15-latin-300.ttf?177cc92d2e8027712a8c1724abd272cd     27 KiB          [emitted]
 WAIT  Compiling...12:08:58

 98% after emitting SizeLimitsPlugin DONE  Compiled successfully in 24ms12:08:59
Asset       Size  Chunks             Chunk Names
                                                     /css/test.css  204 bytes     mix  [emitted]  mix
fonts/open-sans-v15-latin-300.ttf?177cc92d2e8027712a8c1724abd272cd     27 KiB          [emitted]
[... continuing forever]

The font file linked by url() exists and is copied as expected. Using a single line comment instead of a multiline comment in _test2.scss works as expected and does not exhibit this behavior. Moving the multiline comment to test1.scss and removing the @import works as expected, and removing the @font-face also prevents the loop. It’s the combination of @import, @font-face and the multiline comment in the imported file that cause the watch task to loop.

Needless to say, dev and prod tasks work perfectly fine, everything is compiled properly, no errors anywhere.