I understand the importance of displaying your invoices on your shortlist. Rest assured I'm here to help you fix this.
When you say shortlist, are you referring to the bookmarks in the sidebar menu? If so, we can add it again by clicking the Pencil icon beside the Bookmarks section. Then, tick the Invoices checkbox and click Save.
If the problem persists, I recommend troubleshooting your browser to ensure it runs with QuickBooks efficiently. Let's start with accessing QuickBooks Online using incognito mode or a private window or try other supported browsers.
Here are the shortcut keys to go private mode in a browser: