Fix bugs

Author: CrSjimo

src/plugins/audio/internal/subsystems/OutputSystem.cpp

@@ -18,7 +18,9 @@ namespace Audio::Internal {
     OutputSystem::OutputSystem(QObject *parent) : QObject(parent), m_outputContext(new talcs::OutputContext), m_deviceTester(new DeviceTester) {
     }
 
-    OutputSystem::~OutputSystem() = default;
+    OutputSystem::~OutputSystem() {
+        m_outputContext->preMixer()->removeSource(m_deviceTester.get());
+    }
 
     bool OutputSystem::initialize() {
         qCInfo(audioOutputSystem) << "Initializing";

src/plugins/visualeditor/qml/additionaltracks/ClipTrack.qml

@@ -25,7 +25,7 @@ QtObject {
 
         required property QtObject contextObject
         Layout.fillWidth: true
-        clipSequenceViewModel: d.projectViewModelContext?.getSingingClipPerTrackSequenceViewModel(contextObject.editingClip?.clipSequence?.track ?? null)
+        clipSequenceViewModel: d.projectViewModelContext?.getSingingClipPerTrackSequenceViewModel(contextObject.editingClip?.clipSequence?.track ?? null) ?? null
         trackListViewModel: d.projectViewModelContext?.trackListViewModel ?? null
         scrollBehaviorViewModel: contextObject?.scrollBehaviorViewModel ?? null
         timeLayoutViewModel: contextObject?.timeLayoutViewModel ?? null