Within Azure SQL maintenance tasks such as backups and integrity checks are handled for you, and while you may be able to get away with automatic updates keeping your statistics up-to-date, sometimes it's not enough.  Proactively managing statistics in Azure SQL requires some extra steps, and in this Data Exposed episode with Erin Stellato, we'll step through how you can schedule and automate regular updates to statistics. 

For more tips like this, check out the working remotely playlist at
www.youtube.com/FoetronAcademy . Also, if you need any further assistance then you can raise a support ticket and get it addressed.