Thanks for bringing this to our attention, @ifunlisted. I understand how challenging it is when something as important as your mileage tracking doesn’t work as expected. Taking care of those trips is crucial, so let’s go over some troubleshooting measures to get everything back on track.

First, I’d suggest checking if you're using the newest version of the app. Sometimes updates include fixes for freezing or syncing problems.

Also, have you tried resetting the app’s data? If not, I recommend doing so to refresh its functionality and restore optimal performance. Here’s how:

For iOS

1. Tap Settings, then locate General.
2. Select iPhone Storage, then QuickBooks Online app.
3. Press Offload App.
   
   

Once refreshed, restart your device and check if the issue persists. If it does, please uninstall and reinstall it.

In the meantime, you can continue managing your trips using QuickBooks via a web browser. This way, you’ll have access to your unreviewed trips, track your mileage, and stay on top of your records.

If the problem continues, I recommend contacting our Live Support team for assistance. Our experts will review this matter and ensure the mileage tracking feature works. Here's how to connect with our help desk via the app:

1. In the Menu page, click the Help icon.
2. Pick Articles and support, then Contact Us.
3. Enter a keyword or brief description of your concern in the search box, then Continue.
4. Choose Callback for assistance.
   

Let me know how things go. If you have further questions about managing your mileage or need help with anything else in QuickBooks, please don’t hesitate to post here in the Community. I’m more than willing to assist you in sorting this out. Take care.