Hi heavenly-floors0,
Welcome to Community! Your time is valuable and it's essential your work is saved and available when using the QuickBooks Online mobile app. I'll be happy to provide more information so you can get back to business as soon as possible!
In situations like this, it's first recommended to refresh the app. If you experience the same outcome, uninstall and reinstall the app. I also suggest logging into your QuickBooks Online account using a web browser. If the issue persists, please don't hesitate to contact us so we can take a deeper look into the unexpected behavior from our end.
Schedule a Callback or start a Chat: click (?) Help in the upper right in QuickBooks Online > enter "Contact support" > hit Contact Us > provide a brief summary of your situation > hit Let's Talk > choose Get a callback or Start a Chat.
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If you have any other questions or concerns, feel free to reach back out. We're here for you!