A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
Hi Will,
Thank you for the updated information.
You mentioned that the problem happens when some students upload files from different devices to different SharePoint sites, so the problem might be related to the SharePoint in your environment, which needs to be checked from the backend. I suggest you contact the administrator in your company if you aren’t the administrator and follow the steps in the article to open a ticket, this is a most efficient way to fix the issue in your environment.
Appreciate your understanding.
Best regards,
Jazlyn