I've got some troubleshooting steps to help you bypass the unusual behavior where your dropdown lists aren't working.
Let's start by refreshing your page by pressing F5 on your keyboard or click the Refresh button in your browser to ensure the data is updated. I also suggest closing any unnecessary QuickBooks tabs to avoid potential loading errors.
Then, log out and sign back in to your QBO account, as this often fixes the problem by forcing your account changes to sync. You can also access your QBO account in a private or incognito window to start a fresh session. Alternatively, you can try using a supported browser for better performance.
Once you've completed the steps above, please kindly check if the dropdown lists have returned to normal.
If the issue persists, please contact our Live Support team. They can securely check your account and help identify the cause of this unusual behavior affecting the dropdowns.
Please feel free to reply if you have further concerns. We're here to help.