@Thomas Butterfield
Thank you for posting in Microsoft Q&A forum.
Yes, it seems a random issue for different SCCM version, I have two SCCM labs, version 2010 works well but version 2006 has the same issue.
And @Jason Sandys has opened a bug on this issue.
For the details, you may refer to this thread:
https://learn.microsoft.com/en-us/answers/questions/197708/how-can-i-download-updates-for-windows-10-2004.html
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