startAfterDocument with arraycontains

[hemanthkb97]

 Query doctorsquery= FirebaseFirestore.instance
          .collection("doctors")
          .where("searchtext",
              arrayContainsAny:
                  query.split(" ").map((e) => e.toLowerCase().trim()).toList());
if(loadmore){
 fbquery.startAfterDocument(lastdocumentdoc!);
}
final result=await doctorsquery.limit(10).get();

but startAfterDocumen not working
how do i achive this

[hemanthkb97]

FirebaseFirestore.instance
.collection("doctors")
.where("searchlist",
arrayContainsAny:
query.split(" ").map((e) => e.toLowerCase().trim()).toList())
.startAfterDocument(lastdocumentdoc!)
.limit(1)

it works when i do like this but does work like that dont know why