fall through the cracks
verb1
Idiomatic To be missed; to escape the necessary notice or attention.
- Although more than two decades have passed, not a day goes by that I don't wonder how things could and should be different for the many children like Lydia who fall through the cracks because they are misdiagnosed, mistreated, or simply misunderstood.2008, Kari Dunn Buron, Pamela J. Wolfberg, Learners on the Autism Spectrum: Preparing Highly Qualified Educators: