diff --git a/src/app/application.cpp b/src/app/application.cpp
index 7908a9540..5a74d27a4 100644
--- a/src/app/application.cpp
+++ b/src/app/application.cpp
@@ -453,6 +453,7 @@ void Application::runExternalProgram(const QString &programTemplate, const BitTo
     };
 
     const QString logMsg = tr("Running external program. Torrent: \"%1\". Command: `%2`");
+    const QString logMsgError = tr("Failed to run external program. Torrent: \"%1\". Command: `%2`");
 
     // The processing sequenece is different for Windows and other OS, this is intentional
 #if defined(Q_OS_WIN)
@@ -472,8 +473,6 @@ void Application::runExternalProgram(const QString &programTemplate, const BitTo
     for (int i = 1; i < argCount; ++i)
         argList += QString::fromWCharArray(args[i]);
 
-    LogMsg(logMsg.arg(torrent->name(), program));
-
     QProcess proc;
     proc.setProgram(QString::fromWCharArray(args[0]));
     proc.setArguments(argList);
@@ -498,7 +497,11 @@ void Application::runExternalProgram(const QString &programTemplate, const BitTo
         args->startupInfo->hStdOutput = nullptr;
         args->startupInfo->hStdError = nullptr;
     });
-    proc.startDetached();
+
+    if (proc.startDetached())
+        LogMsg(logMsg.arg(torrent->name(), program));
+    else
+        LogMsg(logMsgError.arg(torrent->name(), program));
 #else // Q_OS_WIN
     QStringList args = Utils::String::splitCommand(programTemplate);
 
@@ -514,11 +517,21 @@ void Application::runExternalProgram(const QString &programTemplate, const BitTo
         arg = replaceVariables(arg);
     }
 
-    // show intended command in log
-    LogMsg(logMsg.arg(torrent->name(), replaceVariables(programTemplate)));
-
     const QString command = args.takeFirst();
-    QProcess::startDetached(command, args);
+    QProcess proc;
+    proc.setProgram(command);
+    proc.setArguments(args);
+
+    if (proc.startDetached())
+    {
+        // show intended command in log
+        LogMsg(logMsg.arg(torrent->name(), replaceVariables(programTemplate)));
+    }
+    else
+    {
+        // show intended command in log
+        LogMsg(logMsgError.arg(torrent->name(), replaceVariables(programTemplate)));
+    }
 #endif
 }
 
@@ -732,7 +745,7 @@ try
     actionExit->setIcon(UIThemeManager::instance()->getIcon(u"application-exit"_qs));
     actionExit->setMenuRole(QAction::QuitRole);
     actionExit->setShortcut(Qt::CTRL | Qt::Key_Q);
-    connect(actionExit, &QAction::triggered, this, [this]()
+    connect(actionExit, &QAction::triggered, this, []
     {
         QApplication::exit();
     });
diff --git a/src/base/bittorrent/nativesessionextension.cpp b/src/base/bittorrent/nativesessionextension.cpp
index 248397cf9..7db339f3a 100644
--- a/src/base/bittorrent/nativesessionextension.cpp
+++ b/src/base/bittorrent/nativesessionextension.cpp
@@ -35,26 +35,6 @@
 
 namespace
 {
-    void handleAddTorrentAlert([[maybe_unused]] const lt::add_torrent_alert *alert)
-    {
-#ifndef QBT_USES_LIBTORRENT2
-        if (alert->error)
-            return;
-
-        // libtorrent < 2.0.7 has a bug that add_torrent_alert is posted too early
-        // (before torrent is fully initialized and torrent extensions are created)
-        // so we have to fill "extension data" in add_torrent_alert handler
-
-        // NOTE: `data` may not exist if a torrent is added behind the scenes to download metadata
-        auto *data = static_cast<ExtensionData *>(alert->params.userdata);
-        if (data)
-        {
-            data->status = alert->handle.status({});
-            data->trackers = alert->handle.trackers();
-        }
-#endif
-    }
-
     void handleFastresumeRejectedAlert(const lt::fastresume_rejected_alert *alert)
     {
         alert->handle.unset_flags(lt::torrent_flags::auto_managed);
@@ -76,9 +56,6 @@ void NativeSessionExtension::on_alert(const lt::alert *alert)
 {
     switch (alert->type())
     {
-    case lt::add_torrent_alert::alert_type:
-        handleAddTorrentAlert(static_cast<const lt::add_torrent_alert *>(alert));
-        break;
     case lt::fastresume_rejected_alert::alert_type:
         handleFastresumeRejectedAlert(static_cast<const lt::fastresume_rejected_alert *>(alert));
         break;
diff --git a/src/base/bittorrent/nativetorrentextension.cpp b/src/base/bittorrent/nativetorrentextension.cpp
index 1f8ab1a1e..0fe5838b1 100644
--- a/src/base/bittorrent/nativetorrentextension.cpp
+++ b/src/base/bittorrent/nativetorrentextension.cpp
@@ -36,18 +36,11 @@ NativeTorrentExtension::NativeTorrentExtension(const lt::torrent_handle &torrent
 {
     // NOTE: `data` may not exist if a torrent is added behind the scenes to download metadata
 
-#ifdef QBT_USES_LIBTORRENT2
-    // libtorrent < 2.0.7 has a bug that add_torrent_alert is posted too early
-    // (before torrent is fully initialized and torrent extensions are created)
-    // so we have to fill "extension data" in add_torrent_alert handler and
-    // we have it already filled at this point
-
     if (m_data)
     {
-        m_data->status = m_torrentHandle.status({});
+        m_data->status = m_torrentHandle.status();
         m_data->trackers = m_torrentHandle.trackers();
     }
-#endif
 
     on_state(m_data ? m_data->status.state : m_torrentHandle.status({}).state);
 }
diff --git a/src/base/bittorrent/sessionimpl.cpp b/src/base/bittorrent/sessionimpl.cpp
index 832d39368..944322d90 100644
--- a/src/base/bittorrent/sessionimpl.cpp
+++ b/src/base/bittorrent/sessionimpl.cpp
@@ -1386,27 +1386,29 @@ void SessionImpl::endStartup(ResumeSessionContext *context)
     }
 
     context->deleteLater();
-
-    m_nativeSession->resume();
-    if (m_refreshEnqueued)
-        m_refreshEnqueued = false;
-    else
-        enqueueRefresh();
-
-    m_statisticsLastUpdateTimer.start();
-
-    // Regular saving of fastresume data
-    connect(m_resumeDataTimer, &QTimer::timeout, this, &SessionImpl::generateResumeData);
-    const int saveInterval = saveResumeDataInterval();
-    if (saveInterval > 0)
+    connect(context, &QObject::destroyed, this, [this]
     {
-        m_resumeDataTimer->setInterval(std::chrono::minutes(saveInterval));
-        m_resumeDataTimer->start();
-    }
+        m_nativeSession->resume();
+        if (m_refreshEnqueued)
+            m_refreshEnqueued = false;
+        else
+            enqueueRefresh();
 
-    m_isRestored = true;
-    emit startupProgressUpdated(100);
-    emit restored();
+        m_statisticsLastUpdateTimer.start();
+
+        // Regular saving of fastresume data
+        connect(m_resumeDataTimer, &QTimer::timeout, this, &SessionImpl::generateResumeData);
+        const int saveInterval = saveResumeDataInterval();
+        if (saveInterval > 0)
+        {
+            m_resumeDataTimer->setInterval(std::chrono::minutes(saveInterval));
+            m_resumeDataTimer->start();
+        }
+
+        m_isRestored = true;
+        emit startupProgressUpdated(100);
+        emit restored();
+    });
 }
 
 void SessionImpl::initializeNativeSession()
diff --git a/src/base/bittorrent/torrentimpl.cpp b/src/base/bittorrent/torrentimpl.cpp
index 1f3dd2ef4..01e7f528d 100644
--- a/src/base/bittorrent/torrentimpl.cpp
+++ b/src/base/bittorrent/torrentimpl.cpp
@@ -734,7 +734,13 @@ qreal TorrentImpl::progress() const
         return 1.;
 
     const qreal progress = static_cast<qreal>(m_nativeStatus.total_wanted_done) / m_nativeStatus.total_wanted;
-    Q_ASSERT((progress >= 0.f) && (progress <= 1.f));
+    if ((progress < 0.f) || (progress > 1.f))
+    {
+        LogMsg(tr("Unexpected data detected. Torrent: %1. Data: total_wanted=%2 total_wanted_done=%3.")
+                .arg(name(), QString::number(m_nativeStatus.total_wanted), QString::number(m_nativeStatus.total_wanted_done))
+                , Log::WARNING);
+    }
+
     return progress;
 }