It's good to see you here in the QuickBooks Community, Mark.
I want to ensure you can track your mileage smoothly in QuickBooks Online (QBO). Let's perform several troubleshooting steps to get around this issue.
There are times that the QBO mobile app has data issues, thus causing unusual behaviors when tracking mileage. To get started, let's check your app to verify if it's still tracking your miles. Here's how:
Open your QBO account on your mobile app.
Go to the ☰ (menu) icon, then select Settings.
Click Mileage Settings in the Mileage section.
From there, check the list in the Avoid missed trips section. If all of the settings have a green checkmark, it means you're good to go. If you see a (!), follow the on-screen instructions to make changes.
In addition, third-party antivirus software and apps may interfere with mileage tracking. That said, we can add the QBO mobile app to your permissions lists. To do so, you can follow the steps below:
Go to your device's settings and select Application manager or APPS.
Locate the QuickBooks mobile app and select Mobile Data.
Turn on the settings Allow app while data server on, Allow unrestricted data usage, and Allow background data usage.