Create event sometimes returns 201 but no Teams meeting link

Hello,

I am creating calendar events through Microsoft Graph and setting them as Teams online meetings. Most of the time it works correctly, but very rarely the API returns 201 Created and the event is created without the Teams join link in the response.

I have already checked the following:

• isOnlineMeeting is always set to true.
• The correct online meeting provider is being used.
• The issue is intermittent, not consistent.
• The same integration normally creates Teams meetings successfully.

What I need to understand is:

• Why can Graph return 201 Created but still omit the Teams meeting link?
• Is this a known intermittent issue with event creation or Teams meeting provisioning?
• Is there anything I should check in the response, headers, permissions, or follow-up GET call to verify the meeting link was actually created