Removing previously created assignments from a class or group in Microsoft Teams for Education
Hi Rachael Hurst,
Thanks for the updates. it seems that the glitch affects a student that was removed months ago, but don’t affect students removed recently. For further troubleshooting the issue, I would suggest create a service request for the issue to let agents on backend who have more related resource to help investigate and fix the issue. We appreciate your patience understanding.
To create service request, you may contact with Microsoft 365 admin in your organization firstly, then can create service request from Microsoft 365 admin center>Support.
For more information, please check the articles:
How do I find my Microsoft 365 admin? - Office Support
Ways to contact support for business products - Admin Help
Best Regards,
Clark