diff --git a/src/gui/tray/activitylistmodel.cpp b/src/gui/tray/activitylistmodel.cpp
index 05999258a3ea7..9da43924d68b9 100644
--- a/src/gui/tray/activitylistmodel.cpp
+++ b/src/gui/tray/activitylistmodel.cpp
@@ -440,7 +440,6 @@ void ActivityListModel::startFetchJob()
 
 void ActivityListModel::setFinalList(const ActivityList &finalList)
 {
-    QMutexLocker locker(&_finalListMutex);
     _finalList = finalList;
 
     emit allConflictsChanged();
@@ -669,17 +668,14 @@ void ActivityListModel::removeActivityFromActivityList(const Activity &activity)
     qCInfo(lcActivity) << "Activity/Notification/Error successfully dismissed: " << activity._subject;
     qCInfo(lcActivity) << "Trying to remove Activity/Notification/Error from view... ";
 
-    {
-        QMutexLocker locker(&_finalListMutex);
-        const auto index = _finalList.indexOf(activity);
-        if (index != -1) {
-            qCInfo(lcActivity) << "Activity/Notification/Error successfully removed from the list.";
-            qCInfo(lcActivity) << "Updating Activity/Notification/Error view.";
-
-            beginRemoveRows({}, index, index);
-            _finalList.removeAt(index);
-            endRemoveRows();
-        }
+    const auto index = _finalList.indexOf(activity);
+    if (index != -1) {
+        qCInfo(lcActivity) << "Activity/Notification/Error successfully removed from the list.";
+        qCInfo(lcActivity) << "Updating Activity/Notification/Error view.";
+
+        beginRemoveRows({}, index, index);
+        _finalList.removeAt(index);
+        endRemoveRows();
     }
 
     if (activity._type != Activity::ActivityType &&
@@ -696,14 +692,12 @@ void ActivityListModel::removeActivityFromActivityList(const Activity &activity)
 void ActivityListModel::checkAndRemoveSeenActivities(const OCC::ActivityList &newActivities)
 {
     ActivityList activitiesToRemove;
-    {
-        QMutexLocker locker(&_finalListMutex);
-        for (const auto &activity : _finalList) {
-            if (activity._objectType == QStringLiteral("chat") && !newActivities.contains(activity)) {
-                activitiesToRemove.push_back(activity);
-            }
+    for (const auto &activity : _finalList) {
+        if (activity._objectType == QStringLiteral("chat") && !newActivities.contains(activity)) {
+            activitiesToRemove.push_back(activity);
         }
     }
+
     for (const auto &toRemove : activitiesToRemove) {
         removeActivityFromActivityList(toRemove);
     }
@@ -960,10 +954,7 @@ void ActivityListModel::slotRefreshActivityInitial()
 
 void ActivityListModel::slotRemoveAccount()
 {
-    {
-        QMutexLocker locker(&_finalListMutex);
-        _finalList.clear();
-    }
+    _finalList.clear();
     _activityLists.clear();
     _presentedActivities.clear();
     setAndRefreshCurrentlyFetching(false);
diff --git a/src/gui/tray/activitylistmodel.h b/src/gui/tray/activitylistmodel.h
index dd3b5fc2dd2f4..72716aa4d4283 100644
--- a/src/gui/tray/activitylistmodel.h
+++ b/src/gui/tray/activitylistmodel.h
@@ -191,7 +191,6 @@ private slots:
     ActivityList _listOfIgnoredFiles;
     ActivityList _notificationErrorsLists;
     ActivityList _finalList;
-    QMutex _finalListMutex;
 
     QSet<qint64> _presentedActivities;
 
diff --git a/src/gui/tray/usermodel.cpp b/src/gui/tray/usermodel.cpp
index 3c29f577ffdad..e9a5ed73ae433 100644
--- a/src/gui/tray/usermodel.cpp
+++ b/src/gui/tray/usermodel.cpp
@@ -245,7 +245,6 @@ void User::slotBuildNotificationDisplay(const ActivityList &list)
 
 void User::slotNotificationFetchFinished()
 {
-    QMutexLocker locker(&_isNotificationFetchRunningMutex);
     _isNotificationFetchRunning = false;
 }
 
@@ -451,7 +450,6 @@ void User::slotRefreshNotifications()
     // start a server notification handler if no notification requests
     // are running
     if (_notificationRequestsRunning == 0) {
-        QMutexLocker locker(&_isNotificationFetchRunningMutex);
         if (_isNotificationFetchRunning) {
             qCDebug(lcActivity) << "Notification fetch is already running.";
             return;
diff --git a/src/gui/tray/usermodel.h b/src/gui/tray/usermodel.h
index 6e099e058afd3..bfeaff46d2487 100644
--- a/src/gui/tray/usermodel.h
+++ b/src/gui/tray/usermodel.h
@@ -188,7 +188,6 @@ private slots:
 
     int _lastChatNotificationsReceivedCount = 0;
 
-    QMutex _isNotificationFetchRunningMutex;
     bool _isNotificationFetchRunning = false;
 };