From Longman Dictionary of Contemporary Englishbe/get lost in the shufflebe/get lost in the shuffleto not be noticed or considered because there are so many other things to deal with The information contained in the memo got lost in the shuffle once it reached headquarters. → shuffle
Examples from the Corpus
be/get lost in the shuffle• The theory, however, broke down; both customers and employees got lost in the shuffle.• And in our sandwich, the grated cheese, when melted, got lost in the shuffle of the other ingredients. 