diff --git a/editor/components/inserter/group.js b/editor/components/inserter/group.js
index c32f801338f1b6..555729f9eca988 100644
--- a/editor/components/inserter/group.js
+++ b/editor/components/inserter/group.js
@@ -43,10 +43,14 @@ export default class InserterGroup extends Component {
 		const { current } = this.state;
 		const { selectBlock, bindReferenceNode } = this.props;
 		const { disabled } = block;
+
 		return (
 			<button
 				role="menuitem"
-				key={ block.name }
+				key={ block.name === 'core/block' && block.initialAttributes ?
+					block.name + block.initialAttributes.ref :
+					block.name
+				}
 				className="editor-inserter__block"
 				onClick={ selectBlock( block ) }
 				ref={ bindReferenceNode( block.name ) }