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Dear Lisa Bucher,
Thanks for posting in Microsoft community. We are glad to help you.
I confirmed this behavior with my colleague in the previous thread, we couldn't repro the same issue on our side. Based on my search and experience, some users also reported the same issue in our community, we understand that changing all links manually from SharePoint links to a file location links cost time and is very cumbersome. We think the original links may need to be checked on your side for further investigation.
As forum support we may not have enough permission and resource to directly check the environment on your side.
We notice you post this question in For business category, so we suppose you have Microsoft 365 for business subscription. In this situation, we sincerely recommend you contact your Microsoft 365 administrator, follow steps in this article and try to create a support ticket to contact Online Support. The support team over there has higher permission than us, they can remotely help check the situation on your side, involve more resource to collect logs and help you do troubleshooting. This would be a more efficient way in handling this case for you.
For reference: How do I find my Microsoft 365 admin?
Thanks for your understanding and cooperation! Have a good day.
Sincerely,
Sean | Microsoft Community Moderator