diff --git a/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list.js b/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list.js
index ff5b290..f2cfe87 100644
--- a/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list.js
+++ b/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list.js
@@ -290,14 +290,14 @@
     _resultsChanged(related, submittedTogether, conflicts,
         cherryPicks, sameTopic) {
       const results = [
-        related,
-        submittedTogether,
+        related && related.changes,
+        submittedTogether && submittedTogether.changes,
         conflicts,
         cherryPicks,
         sameTopic,
       ];
       for (let i = 0; i < results.length; i++) {
-        if (results[i].length > 0) {
+        if (results[i] && results[i].length > 0) {
           this.hidden = false;
           this.fire('update', null, {bubbles: false});
           return;
diff --git a/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list_test.html b/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list_test.html
index bfeb694..48cc565 100644
--- a/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list_test.html
+++ b/polygerrit-ui/app/elements/change/gr-related-changes-list/gr-related-changes-list_test.html
@@ -382,7 +382,7 @@
           true);
     });
 
-    test('clear and empties', () => {
+    suite('hidden attribute and update event', () => {
       const changes = [{
         project: 'foo/bar',
         change_id: 'Ideadbeef',
@@ -397,33 +397,68 @@
         _current_revision_number: 1,
         status: 'NEW',
       }];
-      element._relatedResponse = {changes};
-      element._submittedTogether = {changes};
-      element._conflicts = changes;
-      element._cherryPicks = changes;
-      element._sameTopic = changes;
 
-      element.hidden = false;
-      element.clear();
-      assert.isTrue(element.hidden);
-      assert.equal(element._relatedResponse.changes.length, 0);
-      assert.equal(element._submittedTogether.changes.length, 0);
-      assert.equal(element._conflicts.length, 0);
-      assert.equal(element._cherryPicks.length, 0);
-      assert.equal(element._sameTopic.length, 0);
-    });
+      test('clear and empties', () => {
+        element._relatedResponse = {changes};
+        element._submittedTogether = {changes};
+        element._conflicts = changes;
+        element._cherryPicks = changes;
+        element._sameTopic = changes;
 
-    test('update fires', () => {
-      const updateHandler = sandbox.stub();
-      element.addEventListener('update', updateHandler);
+        element.hidden = false;
+        element.clear();
+        assert.isTrue(element.hidden);
+        assert.equal(element._relatedResponse.changes.length, 0);
+        assert.equal(element._submittedTogether.changes.length, 0);
+        assert.equal(element._conflicts.length, 0);
+        assert.equal(element._cherryPicks.length, 0);
+        assert.equal(element._sameTopic.length, 0);
+      });
 
-      element._resultsChanged([], [], [], [], []);
-      assert.isTrue(element.hidden);
-      assert.isFalse(updateHandler.called);
+      test('update fires', () => {
+        const updateHandler = sandbox.stub();
+        element.addEventListener('update', updateHandler);
 
-      element._resultsChanged([], [], [], [], ['test']);
-      assert.isFalse(element.hidden);
-      assert.isTrue(updateHandler.called);
+        element._resultsChanged({}, {}, [], [], []);
+        assert.isTrue(element.hidden);
+        assert.isFalse(updateHandler.called);
+
+        element._resultsChanged({}, {}, [], [], ['test']);
+        assert.isFalse(element.hidden);
+        assert.isTrue(updateHandler.called);
+      });
+
+      suite('hiding and unhiding', () => {
+        test('related response', () => {
+          assert.isTrue(element.hidden);
+          element._resultsChanged({changes}, {}, [], [], []);
+          assert.isFalse(element.hidden);
+        });
+
+        test('submitted together', () => {
+          assert.isTrue(element.hidden);
+          element._resultsChanged({}, {changes}, [], [], []);
+          assert.isFalse(element.hidden);
+        });
+
+        test('conflicts', () => {
+          assert.isTrue(element.hidden);
+          element._resultsChanged({}, {}, changes, [], []);
+          assert.isFalse(element.hidden);
+        });
+
+        test('cherrypicks', () => {
+          assert.isTrue(element.hidden);
+          element._resultsChanged({}, {}, [], changes, []);
+          assert.isFalse(element.hidden);
+        });
+
+        test('same topic', () => {
+          assert.isTrue(element.hidden);
+          element._resultsChanged({}, {}, [], [], changes);
+          assert.isFalse(element.hidden);
+        });
+      });
     });
 
     test('_computeChangeURL uses Gerrit.Nav', () => {