USE_WEBPACK_DEV=true not working

Despite adding: USE_WEBPACK_DEV=true to gck.env changes made to .vue files don't appear until running make down then make up.

I suspect it isn't related, but running make webpack-compile errors:

    ERROR in /data/cache/gitlab/node_modules/monaco-editor/esm/vs/language/css/_deps/vscode-css-languageservice/parser/scssErrors.js 1:0
    Module parse failed: Unexpected character '' (1:0)
    You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
    (Source code omitted for this binary file)
     @ /data/cache/gitlab/node_modules/monaco-editor/esm/vs/language/css/_deps/vscode-css-languageservice/parser/scssParser.js 25:0-49 392:37-51 398:37-51 422:37-51
     @ /data/cache/gitlab/node_modules/monaco-editor/esm/vs/language/css/_deps/vscode-css-languageservice/cssLanguageService.js
     @ /data/cache/gitlab/node_modules/monaco-editor/esm/vs/language/css/cssWorker.js
     @ /data/cache/gitlab/node_modules/monaco-editor/esm/vs/language/css/css.worker.js