Graph API for calendar events Delta cannot $select

Hello, 

I want to use Microsoft Graph Delta to get the changes on events of my calendar.

The functionality is useful and saves me from constantly recovering all events over a period of time.

The problem is that we cannot $select to get only the desired properties.

A single event can some time make like 12000 chars.

I use it on a mobile app and and that's a real loss of performance.

It's already been 1 year that the features is available on User API.

Thanks for reading