QBO Mobile App doesn't allow a bank transaction to be matched to multiple invoices, throws an error every time.

I understand how this affects your workflow. To assist you effectively, could you share the exact error message you're seeing in the app?

In the meantime, let's clear your QuickBooks Online mobile app data to rule out a cached data issue that might be causing this behavior. Here's how:

1. Open your device Settings.
2. Select Apps and choose the QuickBooks app from the list.
3. Tap Clear storage and confirm the prompt when it appears.

You can also consider using QuickBooks in a web browser to match your bank transactions to your invoices.

Let us know if you have other concerns.