Merged r11461, r11462 from trunk (#13251).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.3-stable@11463 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/issue.rb

@@ -187,6 +187,7 @@ class Issue < ActiveRecord::Base
   def reload(*args)
     @workflow_rule_by_attribute = nil
     @assignable_versions = nil
+    @relations = nil
     super
   end