Now and then, random customers disappear off the app on iPhone. Logging out and back in again makes no difference. However, the customer still appears on my computer.

I appreciate you sharing your query here with us, carlgas1969. I've got details to help resolve customer data that disappeared on your QuickBooks Online App.

Sometimes, unusual behaviors like this have caused data damage or stored cached files in your QuickBooks app. Let's reset the app data to refresh your device and set it to its default state. To help you with the troubleshooting steps, refer to these steps:

For iOS

1. Go to Settings and tap General.
2. Click iPhone Storage, then select the QuickBooks Online app.
3. Tap Offload App. This will free up the storage without deleting your app's documents and data.

For Android

1. Go to the Menu ☰ icon and tap More Options ⋮.
2. Click on Settings, then Refresh Data.
3. Select YES to confirm.

Once done, re-open the app and log back into your account. Here’s an article that will guide you on how to get the most up-to-date information in QBO: See your latest data in the QuickBooks Online app.

I'll also include this reference to help you uninstall and reinstall the app in case the issue persists: How to Download the QuickBooks Online Mobile App.

You can reply in the comments below if you require additional assistance managing customer-related tasks in your account. I'll be happy to help you further. Keep safe.

Unfortunately that has not worked.

I appreciate you taking the steps and trying to fix the issue about the sudden disappearance of your customer in the system, carlgas.

Since the issue persists, I recommend contacting our Customer Care Team to request a ticket so they can investigate this further. They have the complete resources and authorization to dig into this and provide prompt resolution.

To proceed, kindly log in to your QuickBooks Online (QBO) account on a regular browser. Then, follow the steps below:

1. Click (?) Help.
2. Select the Search tab and hit Contact Us.
3. Enter a brief description of your issue and tap Continue.
4. Choose a way to connect with us:

• Chat - start a conversation with our live chat support (available all day, Monday till Friday).
• Call us - leave your number and necessary information to get a call back from available personnel. This type of assistance is available from 8:00 AM to 10 PM during weekdays and 8:00 AM to 6:00 PM during weekends.

In the meantime, you may consider maximizing your regular browser to access your QBO account and finish your needed tasks in the system.

I'll also include this article as your reference in checking out what features of QuickBooks are available on your device: Compare mobile app features. This way, you're guided on the available activities you can achieve on the Mobile App.

Please comment below if you have more concerns regarding your customer or any QuickBooks-related queries. I'll be in touch.