Hi AndrewHutter,
Sorry to hear that you're experiencing this issue!
I am Bhavik, a Microsoft user like you. Please note, I am not a Microsoft employee and don’t have direct access to your account, but I will do everything I can to help you with your queries. :)
Have you tried attaching another Word document, just to verify if that issue is there for all the documents or a specific one?
Also, the Word document you're attaching is stored locally or on the cloud and synced to your local machine?
I would also recommend trying another browser, like Microsoft Edge.
Let me know in case of any further assistance is required, I will be glad to assist.
Thanks
Bhavik