1 files changed, 6 insertions, 2 deletions
diff --git a/app/assets/javascripts/zen_mode.js b/app/assets/javascripts/zen_mode.js
index cba7b9227cd..06a86f3b94a 100644
--- a/app/assets/javascripts/zen_mode.js
+++ b/app/assets/javascripts/zen_mode.js
@@ -71,7 +71,7 @@ export default class ZenMode {
     this.active_textarea = this.active_backdrop.find('textarea');
     // Prevent a user-resized textarea from persisting to fullscreen
     this.active_textarea.removeAttr('style');
-    return this.active_textarea.focus();
+    this.active_textarea.focus();
   }
 
   exit() {
@@ -81,7 +81,11 @@ export default class ZenMode {
       this.scrollTo(this.active_textarea);
       this.active_textarea = null;
       this.active_backdrop = null;
-      return Dropzone.forElement('.div-dropzone').enable();
+
+      const $dropzone = $('.div-dropzone');
+      if ($dropzone && !$dropzone.hasClass('js-invalid-dropzone')) {
+        Dropzone.forElement('.div-dropzone').enable();
+      }
     }
   }