If the same problem, I'd suggest resetting the QuickBooks Application. It is the same as clearing the cache from your web browser. You can follow the steps provided below, depending on what you are using.
From More Options, select the Settings tab.
Choose the Refresh Data menu.
Go to the Help menu.
Select Reset App Data.
If the issue persists, let's uninstall and reinstall the app for a clean slate. For uninstalling the QBO app using the iOs device, you can touch and hold the app, then click the Delete app button. You need not worry since it won't delete any of your app's transactions.
Tap Settings on your phone.
Select Apps and Notifications, then locate the QBO app.