diff --git a/app/assets/javascripts/boards/models/issue.js b/app/assets/javascripts/boards/models/issue.js
index 086340105b7b3a2a7e6e12a0b7f9d522ff616039..c92f7fbfffdcd3be27f95db6d901e8bdde221eb7 100644
--- a/app/assets/javascripts/boards/models/issue.js
+++ b/app/assets/javascripts/boards/models/issue.js
@@ -11,12 +11,21 @@ import boardsStore from '../stores/boards_store';
 
 class ListIssue {
   constructor(obj, defaultAvatar) {
+    this.refreshData(obj, defaultAvatar);
+  }
+
+  refreshData(obj, defaultAvatar) {
     this.id = obj.id;
     this.iid = obj.iid;
     this.title = obj.title;
     this.confidential = obj.confidential;
     this.dueDate = obj.due_date;
-    this.subscribed = obj.subscribed;
+
+    // PUT /boards/:id/issues/:iid may not return a definition here
+    if (obj.subscribed !== null) {
+      this.subscribed = obj.subscribed;
+    }
+
     this.labels = [];
     this.assignees = [];
     this.selected = false;
@@ -42,11 +51,15 @@ class ListIssue {
       this.milestone_id = obj.milestone.id;
     }
 
-    obj.labels.forEach(label => {
-      this.labels.push(new ListLabel(label));
-    });
+    if (obj.labels) {
+      obj.labels.forEach(label => {
+        this.labels.push(new ListLabel(label));
+      });
+    }
 
-    this.assignees = obj.assignees.map(a => new ListAssignee(a, defaultAvatar));
+    if (obj.assignees) {
+      this.assignees = obj.assignees.map(a => new ListAssignee(a, defaultAvatar));
+    }
   }
 
   addLabel(label) {
diff --git a/app/assets/javascripts/boards/models/list.js b/app/assets/javascripts/boards/models/list.js
index 7e0ccb9bd2a99f0a8f82f43718e7ea57d70a789f..c1d7807f92fec2d42cadb125dfc13fbba29645f7 100644
--- a/app/assets/javascripts/boards/models/list.js
+++ b/app/assets/javascripts/boards/models/list.js
@@ -1,4 +1,4 @@
-/* eslint-disable no-underscore-dangle, class-methods-use-this, consistent-return, no-shadow, no-param-reassign */
+/* eslint-disable no-underscore-dangle, class-methods-use-this, consistent-return, no-shadow */
 /* global ListIssue */
 
 import { __ } from '~/locale';
@@ -259,12 +259,7 @@ class List {
   }
 
   onNewIssueResponse(issue, data) {
-    issue.id = data.id;
-    issue.iid = data.iid;
-    issue.project = data.project;
-    issue.path = data.real_path;
-    issue.referencePath = data.reference_path;
-    issue.assignableLabelsEndpoint = data.assignable_labels_endpoint;
+    issue.refreshData(data);
 
     if (this.issuesSize > 1) {
       const moveBeforeId = this.issues[1].id;
diff --git a/spec/javascripts/boards/list_spec.js b/spec/javascripts/boards/list_spec.js
index 15c9ff6dfb444cce3de2c3229bb5fc8940e10b0c..c73851cb49be86de53a04bad18ec008bcccfcef2 100644
--- a/spec/javascripts/boards/list_spec.js
+++ b/spec/javascripts/boards/list_spec.js
@@ -174,6 +174,9 @@ describe('List model', () => {
         Promise.resolve({
           data: {
             id: 42,
+            subscribed: false,
+            assignable_labels_endpoint: '/issue/42/labels',
+            toggle_subscription_endpoint: '/issue/42/subscriptions',
           },
         }),
       );
@@ -195,6 +198,9 @@ describe('List model', () => {
         confidential: false,
         labels: [list.label],
         assignees: [],
+        subscribed: false,
+        assignable_labels_endpoint: '/issue/42/labels',
+        toggle_subscription_endpoint: '/issue/42/subscriptions',
       });
 
       list
@@ -202,6 +208,9 @@ describe('List model', () => {
         .then(() => {
           expect(list.issues.length).toBe(2);
           expect(list.issues[0]).toBe(dummyIssue);
+          expect(list.issues[0].subscribed).toBe(false);
+          expect(list.issues[0].assignableLabelsEndpoint).toBe('/issue/42/labels');
+          expect(list.issues[0].toggleSubscriptionEndpoint).toBe('/issue/42/subscriptions');
         })
         .then(done)
         .catch(done.fail);