com.microsoft.graph.models.Message.from.emailAddress.name is getting same as emailAddress

We are sending mail using an utility, we are passing from field as below provided only email address and name is not provided.

"From: <email address>"

Retrieving same mail using graph API, in the response com.microsoft.graph.models.Message.from.emailAddress.name field value is same as the email address instead of blank or null as we have not provided it in From field while sending the mail.