Microsoft graph api error, mail fetching error

Mail fetching error 

Endpoint

https://graph.microsoft.com/v1.0/me/messages?$select=sender,subject,toRecipients,ccRecipients,bccRecipients,createdDateTime&top=50

Action:
After fetching mails with pagination, for some random user at a random time, it fails with 503 Service Unavailable. Some times it fails for specific user other time it works.

Additional Info
Failed response headers

```{

  'strict-transport-security': 'max-age=31536000',

  'request-id': '012dc140-42b5-4fa2-851d-b46a1f206b84',

  'client-request-id': '012dc140-42b5-4fa2-851d-b46a1f206b84',

  'x-ms-ags-diagnostic': '{"ServerInfo":{"DataCenter":"West US","Slice":"E","Ring":"4","ScaleUnit":"001","RoleInstance":"BY1PEPF00006DD7"}}',

  date: 'Thu, 13 Oct 2022 15:26:07 GMT',

  connection: 'close',

  'content-length': '0'

}```