MS Graph APIs delta query with expand and nested select parameters not working together

Question

MS Graph APIs delta query with $expand and nested $select parameters not working together in messages.

https://graph.microsoft.com/v1.0/me/MailFolders/Inbox/messages/delta?$expand=attachments($select=name,size)

This request returns all properties in attachments irrespective of selected properties but the same query is working as expected with below request without delta query.

https://graph.microsoft.com/v1.0/me/MailFolders/Inbox/messages?$expand=attachments($select=name,size)

Answer 1

We don't support '$expand' in Delta Query, as described here : https://developer.microsoft.com/en-us/graph/docs/concepts/delta_query_overview