Hi,Tom Berray
Welcome to the Microsoft Community.
The OneDrive shared folder shortcuts issue you mentioned is a major issue that occurred recently. This issue might be related to a OneDrive cloud server issue. It was brought to the attention of the development team. They indicated that they take this issue very seriously. This is indeed a known issue that needs to be addressed urgently. Engineers are working around the clock to fix it. I sincerely hope you can be patient.
Since the Microsoft community is only a community for technical discussions, I can't participate in development-related content, but I found the latest channel for users to submit reports and feedback on this issue opened by the OneDrive team:
You can open the OneDrive mobile app, shake it, and click Report to send. You can take a screenshot of the problem you encountered and provide a detailed description to the OneDrive engineering team (or you can also send feedback about the problem through the OneDrive link (live.com)

So that they can bring together different manifestations of the problem encountered in an effort to fully understand the full picture of the problem and provide a more complete solution.
I will continue to follow up on the issue for you in this reply thread and share the latest progress of the issue with you as soon as possible.
Best regards
Cherry.Z- MSFT | Microsoft Community Support Specialist