Hi @adminuser 1 ,
As it needs additional troubleshooting, request you to report this by raising a support case a specialized support engineer will assist you better on this.
You can raise technical support request from
https://portal.azure.com/#view/Microsoft_Azure_Support/HelpAndSupportBlade/~/overview or https://admin.microsoft.com/#/support/requests.
Also, there is a similar issue reported: https://github.com/microsoftgraph/microsoft-graph-docs/issues/17418.
Hope this helps.
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