The gear icon is a crucial part of QuickBooks Online. It's the hub for all the options available to customize the QuickBooks experience. I want to make sure you're able to access this as soon as possible so you can continue benefiting from all the great features available to you. Clearing temporary browser data is a simple and effective way to resolve most minor display issues like this. I encourage you to give this a try by following the instructions on this link: Clear Cache and Cookies.
Let me know if it works!