SDS synchronization throw OneRoster API - Not working

Hi,

A few weeks ago i implemented SDS synchronization throw OneRoster API. At that time everything was working fine. The students, teachers, sections and enrollments were all created and appeared on O365 and also on teams.

Now, when I try to use this in a new school, only the students and the teachers are created. I don't get any error on the profile, but the sections are not there. I've tried with other schools and I had the same problem in all of them. Any idea why?

I have already checked the section names to see if they have strange characters and I also confirmed that I am not sending duplicate records either.

Any help would be appreciated. Thanks.