diff --git a/common/Gruntfile.plugin.ts b/common/Gruntfile.plugin.ts
index cf7ed7c..9f7d9bf 100755
--- a/common/Gruntfile.plugin.ts
+++ b/common/Gruntfile.plugin.ts
@@ -35,6 +35,14 @@ function applyPluginRunnerConfiguration(grunt: IGrunt) {
                 cwd: "<%= BUILD_PLUGIN_DIR %>",
                 src: ["public/ts", "public/dev/*.map", `vendor/${mainPkg.name}/*/dev/*.map`]
             },
+            /**
+             * Remove all `dev` folders. This is an optional task and must be added via grunt.registerTask("post:clean:productionSource", ["clean:webpackDevBundles"]).
+             */
+            webpackDevBundles: {
+                expand: true,
+                cwd: "<%= BUILD_PLUGIN_DIR %>",
+                src: ["public/dev/", `vendor/${mainPkg.name}/*/dev/`]
+            },
             packageManageFiles: ["<%= BUILD_PLUGIN_DIR %>/?(composer|package).*"]
         },
         strip_code: /* eslint-disable-line @typescript-eslint/camelcase */ {
diff --git a/devops/.gitlab/stage-build.yml b/devops/.gitlab/stage-build.yml
index 86ed1d9..6f9c704 100755
--- a/devops/.gitlab/stage-build.yml
+++ b/devops/.gitlab/stage-build.yml
@@ -60,6 +60,8 @@ common lint phpcs:
         - yarn tsc -p .
         # Build the plugin
         - yarn build
+        # Output artifact size of plugin zip
+        - du -sh build/*
     artifacts:
         name: $CI_JOB_NAME
         paths: [plugins/$JOB_PACKAGE_NAME/build/]
diff --git a/packages/utils/src/Assets.php b/packages/utils/src/Assets.php
index f650296..98f1630 100755
--- a/packages/utils/src/Assets.php
+++ b/packages/utils/src/Assets.php
@@ -342,7 +342,8 @@ protected function enqueueComposer(
         $useHandle = $vendorHandle !== null ? $vendorHandle : $rootSlug . '-' . $handle . $scriptSuffix;
         $useNonMinifiedSources = $this->useNonMinifiedSources();
         $packageDir = 'vendor/' . $rootSlug . '/' . $handle . '/';
-        $packageSrc = $packageDir . ($useNonMinifiedSources ? 'dev' : 'dist') . '/' . $src;
+        $devBundlesExists = is_dir($packageDir . 'dev');
+        $packageSrc = $packageDir . ($useNonMinifiedSources && $devBundlesExists ? 'dev' : 'dist') . '/' . $src;
         $pluginPath = $this->getPluginConstant(PluginReceiver::$PLUGIN_CONST_PATH);
         $composerPath = path_join($pluginPath, $packageSrc);
         $isInLernaRepo = file_exists(path_join(WP_CONTENT_DIR, 'packages/' . $handle . '/tsconfig.json'));
@@ -523,7 +524,16 @@ public function getPluginsUrl($asset, $isLib = false) {
      * @return string
      */
     public function getPublicFolder($isLib = false) {
-        return 'public/' . ($isLib ? 'lib' : ($this->useNonMinifiedSources() ? 'dev' : 'dist')) . '/';
+        if ($isLib) {
+            return 'public/lib/';
+        } elseif ($this->useNonMinifiedSources()) {
+            // Check if dev folder exists because it can be removed in some builds
+            $path = $this->getPluginConstant(PluginReceiver::$PLUGIN_CONST_PATH);
+            if (is_dir($path . '/public/dev') || is_dir($path . '/src/public/dev') /* monorepo development */) {
+                return 'public/dev/';
+            }
+        }
+        return 'public/dist/';
     }
 
     /**
diff --git a/packages/utils/test/patchwork.json b/packages/utils/test/patchwork.json
index 46060b7..4742ae5 100755
--- a/packages/utils/test/patchwork.json
+++ b/packages/utils/test/patchwork.json
@@ -12,6 +12,7 @@
         "glob",
         "basename",
         "filemtime",
-        "file_get_contents"
+        "file_get_contents",
+        "is_dir"
     ]
 }
diff --git a/packages/utils/test/phpunit/AssetsTest.php b/packages/utils/test/phpunit/AssetsTest.php
index e8fd861..f82cf97 100755
--- a/packages/utils/test/phpunit/AssetsTest.php
+++ b/packages/utils/test/phpunit/AssetsTest.php
@@ -884,7 +884,78 @@ public function testEnqueueComposer() {
         $this->assets->shouldAllowMockingProtectedMethods();
         $this->assets->shouldReceive('enqueueComposer')->passthru();
         $this->assets->shouldReceive('useNonMinifiedSources')->andReturnTrue();
-        $this->expectCallbacksReached(['isLernaRepo']);
+        $self = $this->expectCallbacksReached(['devDirExists', 'isLernaRepo']);
+
+        redefine('is_dir', function($dir) use ($self, $packageDir) {
+            $self->addCallbackReached('devDirExists', $dir === $packageDir . 'dev');
+            return true;
+        });
+
+        WP_Mock::userFunction('path_join', ['times' => 1, 'args' => [PHPUNIT_PATH, $packageSrc]]);
+        WP_Mock::userFunction('path_join', [
+            'times' => 1,
+            'args' => [WP_CONTENT_DIR, 'packages/' . $handle . '/tsconfig.json']
+        ]);
+
+        redefine('file_exists', function () {
+            if (!$this->hasCallbackReached('isLernaRepo')) {
+                $this->addCallbackReached('isLernaRepo');
+                return false;
+            }
+            return true;
+        });
+
+        WP_Mock::userFunction('plugins_url', ['args' => [$packageSrc, PHPUNIT_FILE], 'return' => $plugins_url]);
+        WP_Mock::userFunction('path_join', ['times' => 1, 'args' => [PHPUNIT_PATH, $packageDir . 'package.json']]);
+
+        redefine('filemtime', always($ts));
+        redefine('file_get_contents', always('{"version": "' . $packageJsonVersion . '"}'));
+
+        $this->assets
+            ->shouldReceive('probablyEnqueueComposerChunk')
+            ->once()
+            ->with($handle, 'index.js', [], true, 'all');
+
+        WP_Mock::userFunction('wp_enqueue_script', [
+            'times' => 1,
+            'args' => [$should, $plugins_url, [], $packageJsonVersion, true]
+        ]);
+        WP_Mock::userFunction('path_join', [
+            'times' => 1,
+            'args' => [PHPUNIT_PATH, $packageDir . 'languages/frontend/json']
+        ]);
+
+        $this->assets
+            ->shouldReceive('setLazyScriptTranslations')
+            ->once()
+            ->with($should, $should, null);
+
+        $method = new ReflectionMethod(AssetsImpl::class, 'enqueueComposer');
+        $method->setAccessible(true);
+        $actual = $method->invoke($this->assets, $handle);
+
+        $this->assertEquals($should, $actual);
+        $this->assertCallbacksReached();
+    }
+
+    public function testEnqueueComposerDevFolderNotExists() {
+        $handle = 'utils';
+        $should = PHPUNIT_ROOT_SLUG . '-' . $handle;
+        $packageDir = 'vendor/' . PHPUNIT_ROOT_SLUG . '/' . $handle . '/';
+        $packageSrc = 'vendor/phpunit-root/utils/dist/index.js';
+        $plugins_url = 'http://localhost/wp-content/plugins/phpunit/' . $packageSrc;
+        $ts = time();
+        $packageJsonVersion = '1.0.0';
+
+        $this->assets->shouldAllowMockingProtectedMethods();
+        $this->assets->shouldReceive('enqueueComposer')->passthru();
+        $this->assets->shouldReceive('useNonMinifiedSources')->andReturnTrue();
+        $self = $this->expectCallbacksReached(['devDirExists', 'isLernaRepo']);
+
+        redefine('is_dir', function($dir) use ($self, $packageDir) {
+            $self->addCallbackReached('devDirExists', $dir === $packageDir . 'dev');
+            return false;
+        });
 
         WP_Mock::userFunction('path_join', ['times' => 1, 'args' => [PHPUNIT_PATH, $packageSrc]]);
         WP_Mock::userFunction('path_join', [
@@ -945,6 +1016,8 @@ public function testEnqueueComposerInLernaRepo() {
         $this->assets->shouldReceive('enqueueComposer')->passthru();
         $this->assets->shouldReceive('useNonMinifiedSources')->andReturnTrue();
 
+        redefine('is_dir', always(true));
+
         WP_Mock::userFunction('path_join');
 
         redefine('file_exists', always(true));
@@ -981,6 +1054,8 @@ public function testEnqueueComposerWithNonExistingFile() {
         $this->assets->shouldReceive('enqueueComposer')->passthru();
         $this->assets->shouldReceive('useNonMinifiedSources')->andReturnTrue();
 
+        redefine('is_dir', always(true));
+
         WP_Mock::userFunction('path_join');
 
         redefine('file_exists', always(false));
@@ -1008,6 +1083,8 @@ public function testEnqueueComposerWithStyle() {
         $this->assets->shouldReceive('useNonMinifiedSources')->andReturnTrue();
         $this->expectCallbacksReached(['isLernaRepo']);
 
+        redefine('is_dir', always(true));
+
         WP_Mock::userFunction('path_join', ['times' => 1, 'args' => [PHPUNIT_PATH, $packageSrc]]);
         WP_Mock::userFunction('path_join', [
             'times' => 1,
@@ -1060,6 +1137,8 @@ public function testEnqueueComposerWithStyleParameters() {
         $this->assets->shouldReceive('useNonMinifiedSources')->andReturnTrue();
         $this->expectCallbacksReached(['isLernaRepo']);
 
+        redefine('is_dir', always(true));
+
         WP_Mock::userFunction('path_join');
 
         redefine('file_exists', function () {
@@ -1104,6 +1183,8 @@ public function testEnqueueComposerWithScriptParameters() {
         $this->assets->shouldReceive('useNonMinifiedSources')->andReturnTrue();
         $this->expectCallbacksReached(['isLernaRepo']);
 
+        redefine('is_dir', always(true));
+
         WP_Mock::userFunction('path_join');
 
         redefine('file_exists', function () {
@@ -1334,6 +1415,21 @@ public function testGetPublicFolderDev() {
         $this->assets->shouldReceive('getPublicFolder')->passthru();
         $this->assets->shouldReceive('useNonMinifiedSources')->andReturnTrue();
 
+        redefine('is_dir', always(true));
+
+        $actual = $this->assets->getPublicFolder();
+
+        $this->assertEquals($should, $actual);
+    }
+
+    public function testGetPublicFolderDevButDoesNotExist() {
+        $should = 'public/dist/';
+
+        $this->assets->shouldReceive('getPublicFolder')->passthru();
+        $this->assets->shouldReceive('useNonMinifiedSources')->andReturnTrue();
+
+        redefine('is_dir', always(false));
+
         $actual = $this->assets->getPublicFolder();
 
         $this->assertEquals($should, $actual);