--- redmine.orig/app/controllers/projects_controller.rb  2017-05-16 17:24:44.074160792 +0200
+++ redmine/app/controllers/projects_controller.rb      2017-05-16 17:25:19.880653954 +0200
@@ -137,12 +137,12 @@
     @users_by_role = @project.users_by_role
     @subprojects = @project.children.visible.to_a
     @news = @project.news.limit(5).includes(:author, :project).reorder("#{News.table_name}.created_on DESC").to_a
-    @trackers = @project.rolled_up_trackers.visible
+    @trackers = @project.rolled_up_trackers

     cond = @project.project_condition(Setting.display_subprojects_issues?)

-    @open_issues_by_tracker = Issue.visible.open.where(cond).group(:tracker).count
-    @total_issues_by_tracker = Issue.visible.where(cond).group(:tracker).count
+    @open_issues_by_tracker = Issue.joins(:project).open.where(cond).group(:tracker).count
+    @total_issues_by_tracker = Issue.joins(:project).where(cond).group(:tracker).count

     if User.current.allowed_to_view_all_time_entries?(@project)
       @total_hours = TimeEntry.visible.where(cond).sum(:hours).to_f