Dear Shahin Tebyanian
Thanks for your quick response!
Your certain part of scenario should be diagnosed by Microsoft's backend side support team via collecting some logs information such as debugging logs or some other logs. Frontline technical support engineer can also involve specific support team for further investigation about some particular situation if it is required. After diagnosing the scenario, our technical support team can provide possible information from their end.
If there are any known issues, this information can be provided by the technical support engineer from their backend resources.
Since we forum moderators have limited permissions and access resources, due to this reason, we are unable to connect Microsoft frontline support team from this public community for further diagnosis.
For the above provided standard process information, in your organization, Office 365 global admin person may need to contact Office 365 support team on backend via an open service request so they can diagnose this specific scenario through some more technical resources,
For this standard process, here's the official document for the global admin reference: Get support - Microsoft 365 admin | Microsoft Learn (Online Option).
Thanks for your precious time and your understanding would be highly appreciated. Have a nice day!
Sincerely,
Allen | Community Moderator