Hi Sara.

I want to ensure you'll be able to run your reports smoothly in the QuickBooks Desktop app.

Since your application and ios are already up to date, I'll be sharing with you some additional troubleshooting steps to isolate the issue. 

At this time, you can clear your app's data to remove the cache that causes unusual behaviour while working with QuickBooks.

1. In your QuickBooks Online app, go to the ☰ menu.
2. Click on Help & Feedback.
3. Tap on Refresh Data, and then select Refresh.

or 

1. Go to the Setting General iPhone Storage.
2. Choose an app that's taking up a lot of space.
3. Click on Offload App.

Once done, try opening your reports again.

Moreover, here's how you can reset the QuickBooks app's data for Windows and Mac.

I'm also adding this link for additional resources on how you can customise, run, and share your reports.

Please let me know if you encounter any other issues with QuickBooks or your reports. I'm always here to take care of your concerns. Keep safe!