diff --git a/ghost/admin/lib/koenig-editor/addon/options/key-commands.js b/ghost/admin/lib/koenig-editor/addon/options/key-commands.js
index eb92304bbd..00aa4608d4 100644
--- a/ghost/admin/lib/koenig-editor/addon/options/key-commands.js
+++ b/ghost/admin/lib/koenig-editor/addon/options/key-commands.js
@@ -6,6 +6,10 @@ export default function (editor) {
         str: 'SHIFT+ENTER',
 
         run(editor) {
+            if (!editor.range.headSection.isMarkerable) {
+                return;
+            }
+
             editor.run((postEditor) => {
                 let softReturn = postEditor.builder.createAtom('soft-return');
                 postEditor.insertMarkers(editor.range.head, [softReturn]);