As you said, from the MSDN blog article, ReFS will not support "named streams, object IDs, short names, compression, file level encryption (EFS), user data transactions, sparse, hard-links, extended attributes, and quotas". See:
Building the next generation file system for Windows: ReFS
This article is updated in January. For your current situation, we do not have enough information to make sure it is a change or sparese files could just be created on FeFS but not work correctly. We may need to wait for further information and I will try
to contact related department for your case. Thank you for your time.
TechNet Subscriber Support in forum |If you have any feedback on our support, please contact firstname.lastname@example.org.
Microsoft is conducting an online survey to understand your opinion of the Technet Web site. If you choose to participate, the online survey will be presented to you when you leave the Technet Web site.