To the OP: If its a RANDOM drop, then it's 100% possible that it just hasn't RANDOMLY come up yet.
ran·dom
ˈrandəm/
adjective
adjective: random
1.
made, done, happening, or chosen without method or conscious decision.
"a random sample of 100 households"
synonyms: unsystematic, unmethodical, arbitrary, unplanned, undirected, casual, indiscriminate, nonspecific, haphazard, stray, erratic;
