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Dear cinhoff,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
From your description It seems Properties Not Loading Sharepoint Data When Document Opened in Desktop Application behavior from your side.
apologized situation you encountered, we do understand the inconvenience caused and apologize for it.
I have carefully read your question. As a community, we are here to provide you with suggestions and guidance, but we don't have the permission or necessary resources to test the issue from the backend. From your description, it appears that the issue should be escalated to the backend team. Unfortunately, as a community, we don't have permission to test the issue on our end. However, we can guide you towards the correct path to resolve your issue. Please follow the steps below to contact Office 365 support.
If you don’t have the admin permission on your organization you can contact your office 365 administrator to go to Microsoft 365 >> Admin Center-> Support-> New Service Request if you have admin permission you can directly follow the steps upper without contacting administrators help. Please use my below picture as a references or you can refer to this article to check the way how to raise a ticket.
Get support - Microsoft 365 admin | Microsoft Learn
Please provide all necessary issue information and then click on Contact Support. Our support team will begin working on your issue as soon as possible.
Thank you for you precious time and cooperation.
Have a nice day!
Best regards,