diff --git a/app/assets/javascripts/copy_as_gfm.js.es6 b/app/assets/javascripts/copy_as_gfm.js.es6
index c55aee39fcab124379423a668e914a31ca85ce33..80e30fdf390b75d6c52aefcd19c6ca84dec3a4e1 100644
--- a/app/assets/javascripts/copy_as_gfm.js.es6
+++ b/app/assets/javascripts/copy_as_gfm.js.es6
@@ -260,6 +260,9 @@
       const documentFragment = window.gl.utils.getSelectedFragment();
       if (!documentFragment) return;
 
+      // If the documentFragment contains more than just Markdown, don't copy as GFM.
+      if (documentFragment.querySelector('.md, .wiki')) return;
+
       e.preventDefault();
       clipboardData.setData('text/plain', documentFragment.textContent);
 
diff --git a/app/assets/javascripts/shortcuts_issuable.js b/app/assets/javascripts/shortcuts_issuable.js
index 363379f49ae3a2e3a82a0bbc2d662c229684d24e..6603b9679b989d38ff0d12016c6e63ce99acf2d7 100644
--- a/app/assets/javascripts/shortcuts_issuable.js
+++ b/app/assets/javascripts/shortcuts_issuable.js
@@ -44,6 +44,9 @@
       documentFragment = window.gl.utils.getSelectedFragment();
       if (!documentFragment) return;
 
+      // If the documentFragment contains more than just Markdown, don't copy as GFM.
+      if (documentFragment.querySelector('.md, .wiki')) return;
+
       selected = window.gl.CopyAsGFM.nodeToGFM(documentFragment);
 
       replyField = $('.js-main-target-form #note_note');