Try offset pagination again

app/graphql/resolvers/board_list_issues_resolver.rb

@@ -7,10 +7,8 @@ module Resolvers
     alias_method :list, :object
 
     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, issues.id DESC")
-      # rubocop: enable CodeReuse/ActiveRecord
+      Gitlab::Graphql::Pagination::OffsetActiveRecordRelationConnection.new(service.execute)
     end
   end
 end

app/graphql/types/issuable_connection_type.rb

@@ -7,7 +7,11 @@ module Types
           description: 'Total count of collection'
 
     def count
+      # rubocop: disable CodeReuse/ActiveRecord
       relation = object.items
+      # sometimes relation is an Array
+      relation = relation.reorder(nil) if relation.respond_to?(:reorder)
+      # rubocop: enable CodeReuse/ActiveRecord
 
       if relation.try(:group_values)&.present?
         relation.size.keys.size

spec/graphql/resolvers/board_list_issues_resolver_spec.rb

@@ -27,7 +27,7 @@ RSpec.describe Resolvers::BoardListIssuesResolver do
         issue3 = create(:issue, project: project, labels: [label], relative_position: 10)
 
         # by relative_position and then ID
-        issues = resolve_board_list_issues
+        issues = resolve_board_list_issues.items
 
         expect(issues.map(&:id)).to eq [issue3.id, issue1.id, issue2.id]
       end