application fee was returned

My D applied to UMD-CP a few weeks ago. She hasn’t received any decision. In fact, there are still a couple of items (teacher recs) missing from her application, so it isn’t complete. Today, we received a refund of the application fee with no explanation. Does anyone know what the issue might be? Has this happened to you?

https://www.admissions.umd.edu/apply/FeeWaivers.php

“The university waives the application fee for high school seniors who are National Merit, National Achievement or National Hispanic finalists or semifinalists. We honor fee waivers granted by the College Board, American College Testing program, College Bound and National Association for College Admission Counseling. If you are not in possession of a fee waiver from one of these organizations, but have a demonstrated financial need, please contact our office.”