diff --git a/src/applications/conpherence/controller/ConpherenceUpdateController.php b/src/applications/conpherence/controller/ConpherenceUpdateController.php
--- a/src/applications/conpherence/controller/ConpherenceUpdateController.php
+++ b/src/applications/conpherence/controller/ConpherenceUpdateController.php
@@ -607,8 +607,13 @@
         $user,
         $conpherence,
         !$minimal_display);
-      $participant_obj = $conpherence->getParticipant($user->getPHID());
-      $participant_obj->markUpToDate($conpherence, $data['latest_transaction']);
+      $key = PhabricatorConpherenceColumnMinimizeSetting::SETTINGKEY;
+      $minimized = $user->getUserSetting($key);
+      if (!$minimized) {
+        $participant_obj = $conpherence->getParticipant($user->getPHID());
+        $participant_obj
+          ->markUpToDate($conpherence, $data['latest_transaction']);
+      }
     } else if ($need_transactions) {
       $non_update = true;
       $data = array();