Hello, @Pat_Sharp.

We wish that you didn't have to experience this issue while using QuickBooks.
 

There is an ongoing investigation into this issue. I recommend contacting QuickBooks Online Support Experts to add you to the list of customers who also have attachment concerns.

Here's how:
 

1. Select Help (?).
2. Click the Search tab to get started:
3. Select Contact Us.
4. Enter the topic of your concern.
5. Select Continue.
6. Choose either Chat or Callback.

I'll add an article here to know more about attachments in QuickBooks Online: Add or delete attachments in QuickBooks Online.

If you have additional questions about attachments, you can reply to this post. Keep safe!