MarkdownShortcutPlugin is not showing resultant styling for Header markdown

[jsoneaday]

Version, Operative system I am on lexical 0.12.0 and Mac Ventura 13.5.1

Describe the bug When I write markdown in the text area for creating a header it does not show the desired style. However if I type bold or italics markdown (*, ) it immediately updates into the styled text.

To Reproduce Steps to reproduce the behavior:

1. Create this jsx

   <LexicalComposer initialConfig={initialConfig}>
     <PlainTextPlugin
       contentEditable={<ContentEditable className="texteditor-container" />}
       placeholder={<div>Enter some text...</div>}
       ErrorBoundary={LexicalErrorBoundary}
     />
     <MarkdownShortcutPlugin transformers={DEFAULT_TRANSFORMERS} />
     <HistoryPlugin />
     <OnChangePlugin onChange={onChangeState} />
   </LexicalComposer>

2. Pass in this initialConfig

   const initialConfig = {
   namespace: "JobDescEditor",
   theme,
   onError,
   editable: true,
   nodes: [
   HorizontalRuleNode,
   CodeNode,
   HeadingNode, // I was hoping this is the header node?
   LinkNode,
   ListNode,
   ListItemNode,
   QuoteNode,
   ],
   };

3. Run app and see results similar to below

Screenshots