My son applied to a few schools post M10 with rolling admissions. (He was accepted at one and is heading there). However, one of the ones that he had a fairly active process with…totally ghosted him. No rejection letter, no WL letter, no communications at all after he had submitted everything.
I know schools have tons of applicants to deal with but, even if it fell between the cracks…well frankly it should never fall between the cracks.