Use Offset rather than Keyset pagination

app/graphql/resolvers/board_list_issues_resolver.rb

@@ -9,7 +9,7 @@ module Resolvers
     def resolve(**args)
       # rubocop: disable CodeReuse/ActiveRecord
       service = Boards::Issues::ListService.new(list.board.resource_parent, context[:current_user], { board_id: list.board.id, id: list.id })
-      service.execute.reorder("issues.relative_position ASC").order("issues.id DESC")
+      Gitlab::Graphql::Pagination::OffsetActiveRecordRelationConnection.new(service.execute)
       # rubocop: enable CodeReuse/ActiveRecord
     end
   end

app/graphql/types/issuable_connection_type.rb

@@ -7,7 +7,7 @@ module Types
           description: 'Total count of collection'
 
     def count
-      relation = object.items
+      relation = object.items.reorder(nil)
 
       if relation.try(:group_values)&.present?
         relation.size.keys.size