src/app/modules/channels/feed/feed.html

@@ -4,7 +4,7 @@
   <m-onboarding-feed *ngIf="session.isLoggedIn() && session.getLoggedInUser().guid == user.guid"></m-onboarding-feed>
   <m-newsfeed--boost-rotator [channel]="user" interval="12" *ngIf="user.guid !== session.getLoggedInUser().guid && user.show_boosts"></m-newsfeed--boost-rotator>
   <minds-activity *ngFor="let activity of pinned; let i = index" [object]="activity" [boostToggle]="activity.boostToggle" class="mdl-card m-border item" (delete)="delete(activity)" [slot]="i + 1"></minds-activity>
-  <minds-activity *ngFor="let activity of feed; let i = index" [object]="activity" [boostToggle]="activity.boostToggle" class="mdl-card m-border item" (delete)="delete(activity)" [slot]="i + pinned.length + 1"></minds-activity>
+  <minds-activity *ngFor="let activity of feed; let i = index" [object]="activity" [boostToggle]="activity.boostToggle" class="mdl-card m-border item" (delete)="delete(activity)" [slot]="i + (pinned?.length || 0) + 1"></minds-activity>
   <infinite-scroll
     distance="25%"
     (load)="loadFeed()"

src/app/modules/groups/profile/feed/legacy.html

@@ -41,7 +41,7 @@
           [object]="a"
           [canDelete]="group['is:owner'] || group['is:moderator']"
           (delete)="delete(a)"
-          [slot]="i + pinned.length + 1"
+          [slot]="i + (pinned?.length || 0) + 1"
         >
           <!-- Menu Actions -->
           <li post-menu