Hi Kevin,
Thanks for posting in the community. We are happy to help you.
I can reproduce the same situation. Based on my research, no settings can change this behavior. While I haven't found any official articles mentioning this as a limitation, I think it is a case-specific limitation (when online files are stored as SharePoint list attachments). Here is a thread where another user was in the same situation.
In this case, as a workaround, you can choose not to store the file as a list attachment, but rather store the file in a SharePoint library and then use the Hyperlink column to link the relevant file.
Based on the situation, I recommend you send feedback to Microsoft.
- Send feedback in the Office app
Click File> Feedback (or the Help tab> Feedback)> I Don't Like Something.
- I recommend you post your feedback in the Microsoft Feedback Portal where other members also post and vote for their feedback. It's the platform for us to hear your voice and improve our products.
Sorry for the inconvenience that happened to you. Appreciate your understanding.
Sincerely,
George | Microsoft Community Moderator