Index: app/models/issue.rb
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- app/models/issue.rb	(revision 6d260195e1f4269340b30e5ef2b401c2f92aed09)
+++ app/models/issue.rb	(date 1611739322377)
@@ -914,7 +914,7 @@
 
   # Returns true if the issue is overdue
   def overdue?
-    due_date.present? && (due_date < User.current.today) && !closed?
+    due_date && (due_date < (closed_on ? closed_on : Date.current))
   end
 
   # Is the amount of work done less than it should for the due date
Index: test/unit/issue_test.rb
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- test/unit/issue_test.rb	(revision 6d260195e1f4269340b30e5ef2b401c2f92aed09)
+++ test/unit/issue_test.rb	(date 1611905435592)
@@ -2397,13 +2397,17 @@
   def test_overdue
     User.current = nil
     today = User.current.today
-    assert  Issue.new(:due_date => (today - 1.day).to_date).overdue?
+    closed_status = IssueStatus.where(:is_closed => true).first
+
+    assert  Issue.new(:due_date => (today - 1.day)).overdue?
     assert !Issue.new(:due_date => today).overdue?
-    assert !Issue.new(:due_date => (today + 1.day).to_date).overdue?
+    assert !Issue.new(:due_date => (today + 1.day)).overdue?
     assert !Issue.new(:due_date => nil).overdue?
-    assert !Issue.new(:due_date => (today - 1.day).to_date,
-                      :status => IssueStatus.where(:is_closed => true).first
-                      ).overdue?
+
+    assert  Issue.new(:due_date => (today - 1.day), :closed_on => today, :status => closed_status).overdue?
+    assert !Issue.new(:due_date => today, :closed_on => today, :status => closed_status).overdue?
+    assert !Issue.new(:due_date => (today + 1.day), :closed_on => today, :status => closed_status).overdue?
+    assert !Issue.new(:due_date => nil, :closed_on => today, :status => closed_status).overdue?
   end
 
   test "#behind_schedule? should be false if the issue has no start_date" do
@@ -3184,7 +3188,7 @@
     user_in_asia = users(:users_002)
     user_in_asia.pref.update! :time_zone => 'Hongkong'
 
-    issue = Issue.generate! :due_date => Date.parse('2016-03-20')
+    issue = Issue.generate! :due_date => Date.parse('2016-03-21')
 
     # server time is UTC
     time = Time.parse '2016-03-20 20:00 UTC'