Dear MNadirashvili,
Good day!! Thanks for posting your concern on this Microsoft Community~
As per the description shared, I understand your concern and I would like to confirm whether the problematic user is member of the group associated with the Plan.
If the user is part of the group associated with the Plan but having the issue, then
I would like to request you check whether the same problem happen in the InPrivate or Incognito window of the browser.
If the same problem happens, I am sorry and I believe the problem should be investigated by the related development team, where there collect the related logs by reproducing the problem and investigate the issue further.
Note:I have checked the service health dashboard at the Microsoft end, where there is no related incident found.
So, I request you raise a new service request from the Microsoft 365 admin center, where the related team will get in touch with you on your preferred contact method for further investigation: Get support - Microsoft 365 admin | Microsoft Learn (If you are not the IT admin of your organization, please contact the IT admin of your organization: How do I find my Microsoft 365 admin? - Microsoft Support, to raise a new service request on your behalf).
Note: Please accept our sincere apologies for redirecting you to related development support team because the moderators in this community are limited with the resource for further investigation and to get a quick resolution to your problem, we requested it.
I appreciate your patience and understanding. Have a wonderful day!!
Best Regards,
Sophia