diff --git a/include/SubWindow.h b/include/SubWindow.h
index ad51780904f..d723981417c 100644
--- a/include/SubWindow.h
+++ b/include/SubWindow.h
@@ -76,6 +76,7 @@ public slots:
 	void paintEvent( QPaintEvent * pe ) override;
 	void changeEvent( QEvent * event ) override;
 	void showEvent( QShowEvent* event ) override;
+	bool eventFilter( QObject * obj, QEvent * event ) override;
 
 	bool isDetached() const;
 
diff --git a/plugins/vestige/vestige.cpp b/plugins/vestige/vestige.cpp
index 97af8bc43b8..98e7d639f09 100644
--- a/plugins/vestige/vestige.cpp
+++ b/plugins/vestige/vestige.cpp
@@ -103,8 +103,15 @@ class vstSubWin : public SubWindow
 	{
 		// ignore close-events - for some reason otherwise the VST GUI
 		// remains hidden when re-opening
-		hide();
-		e->ignore();
+		if (windowFlags().testFlag(Qt::Window))
+		{
+			e->accept();
+		}
+		else
+		{
+			hide();
+			e->ignore();
+		}
 	}
 };
 
diff --git a/src/gui/ControllerDialog.cpp b/src/gui/ControllerDialog.cpp
index f854ab1b94e..8e3583f987d 100644
--- a/src/gui/ControllerDialog.cpp
+++ b/src/gui/ControllerDialog.cpp
@@ -27,6 +27,8 @@
 
 #include "ControllerDialog.h"
 #include "Controller.h"
+#include "GuiApplication.h"
+#include "MainWindow.h"
 
 
 ControllerDialog::ControllerDialog( Controller * _controller,
@@ -46,7 +48,20 @@ ControllerDialog::~ControllerDialog()
 
 void ControllerDialog::closeEvent( QCloseEvent * _ce )
 {
-	_ce->ignore();
+	if (windowFlags().testFlag(Qt::Window))
+	{
+		_ce->accept();
+	}
+	else if (getGUI()->mainWindow()->workspace())
+	{
+		parentWidget()->hide();
+		_ce->ignore();
+	}
+	else
+	{
+		hide();
+		_ce->ignore();
+	}
 	emit closed();
 }
 
diff --git a/src/gui/EffectControlDialog.cpp b/src/gui/EffectControlDialog.cpp
index 3439835d139..f4567bed0e3 100644
--- a/src/gui/EffectControlDialog.cpp
+++ b/src/gui/EffectControlDialog.cpp
@@ -28,6 +28,8 @@
 
 #include "EffectControlDialog.h"
 #include "EffectControls.h"
+#include "GuiApplication.h"
+#include "MainWindow.h"
 
 
 EffectControlDialog::EffectControlDialog( EffectControls * _controls ) :
@@ -51,7 +53,20 @@ EffectControlDialog::~EffectControlDialog()
 
 void EffectControlDialog::closeEvent( QCloseEvent * _ce )
 {
-	_ce->ignore();
+	if (windowFlags().testFlag(Qt::Window))
+	{
+		_ce->accept();
+	}
+	else if (getGUI()->mainWindow()->workspace())
+	{
+		parentWidget()->hide();
+		_ce->ignore();
+	}
+	else
+	{
+		hide();
+		_ce->ignore();
+	}
 	emit closed();
 }
 
diff --git a/src/gui/InstrumentTrackWindow.cpp b/src/gui/InstrumentTrackWindow.cpp
index eb6f7c410fe..d7b2826f16a 100644
--- a/src/gui/InstrumentTrackWindow.cpp
+++ b/src/gui/InstrumentTrackWindow.cpp
@@ -501,15 +501,19 @@ void InstrumentTrackWindow::toggleVisibility( bool on )
 
 void InstrumentTrackWindow::closeEvent( QCloseEvent* event )
 {
-	event->ignore();
-
-	if( getGUI()->mainWindow()->workspace() )
+	if (windowFlags().testFlag(Qt::Window))
+	{
+		event->accept();
+	}
+	else if (getGUI()->mainWindow()->workspace())
 	{
 		parentWidget()->hide();
+		event->ignore();
 	}
 	else
 	{
 		hide();
+		event->ignore();
 	}
 
 	m_itv->m_tlb->setFocus();
diff --git a/src/gui/MixerView.cpp b/src/gui/MixerView.cpp
index 2cae9ad6f0d..2fb3964b7f3 100644
--- a/src/gui/MixerView.cpp
+++ b/src/gui/MixerView.cpp
@@ -554,17 +554,22 @@ void MixerView::keyPressEvent(QKeyEvent * e)
 
 
 void MixerView::closeEvent( QCloseEvent * _ce )
- {
-	if( parentWidget() )
+{
+	if (windowFlags().testFlag(Qt::Window))
+	{
+		_ce->accept();
+	}
+	else if (getGUI()->mainWindow()->workspace())
 	{
 		parentWidget()->hide();
+		_ce->ignore();
 	}
 	else
 	{
 		hide();
+		_ce->ignore();
 	}
-	_ce->ignore();
- }
+}
 
 
 
diff --git a/src/gui/SampleTrackWindow.cpp b/src/gui/SampleTrackWindow.cpp
index 87273461fb9..88bdd89d1c0 100644
--- a/src/gui/SampleTrackWindow.cpp
+++ b/src/gui/SampleTrackWindow.cpp
@@ -230,15 +230,19 @@ void SampleTrackWindow::toggleVisibility(bool on)
 
 void SampleTrackWindow::closeEvent(QCloseEvent* ce)
 {
-	ce->ignore();
-
-	if(getGUI()->mainWindow()->workspace())
+	if (windowFlags().testFlag(Qt::Window))
+	{
+		ce->accept();
+	}
+	else if (getGUI()->mainWindow()->workspace())
 	{
 		parentWidget()->hide();
+		ce->ignore();
 	}
 	else
 	{
 		hide();
+		ce->ignore();
 	}
 
 	m_stv->m_tlb->setFocus();
@@ -262,4 +266,4 @@ void SampleTrackWindow::loadSettings(const QDomElement& element)
 	{
 		m_stv->m_tlb->setChecked(true);
 	}
-}
\ No newline at end of file
+}
diff --git a/src/gui/SubWindow.cpp b/src/gui/SubWindow.cpp
index 2dc52deb0b2..d4366b86dce 100644
--- a/src/gui/SubWindow.cpp
+++ b/src/gui/SubWindow.cpp
@@ -260,6 +260,7 @@ void SubWindow::detach()
 	if (isDetached()) {
 		return;
 	}
+
 	auto pos = mapToGlobal(widget()->pos());
 	widget()->setWindowFlags(Qt::Window);
 	widget()->show();
@@ -433,3 +434,17 @@ void SubWindow::resizeEvent( QResizeEvent * event )
 		m_trackedNormalGeom.setSize( event->size() );
 	}
 }
+
+bool SubWindow::eventFilter(QObject * obj, QEvent * event)
+{
+	if (obj != static_cast<QObject *>(widget())) {
+		return QMdiSubWindow::eventFilter(obj, event);
+	}
+	switch (event->type()) {
+	case QEvent::WindowStateChange:
+		event->accept();
+		return true;
+	default:
+		return QMdiSubWindow::eventFilter(obj, event);
+	}
+}
diff --git a/src/gui/widgets/ControllerRackView.cpp b/src/gui/widgets/ControllerRackView.cpp
index 99d9241d736..8984adecb63 100644
--- a/src/gui/widgets/ControllerRackView.cpp
+++ b/src/gui/widgets/ControllerRackView.cpp
@@ -203,14 +203,19 @@ void ControllerRackView::addController()
 
 void ControllerRackView::closeEvent( QCloseEvent * _ce )
  {
-	if( parentWidget() )
+	if (windowFlags().testFlag(Qt::Window))
+	{
+		_ce->accept();
+	}
+	else if (getGUI()->mainWindow()->workspace())
 	{
 		parentWidget()->hide();
+		_ce->ignore();
 	}
 	else
 	{
 		hide();
+		_ce->ignore();
 	}
-	_ce->ignore();
  }
 
diff --git a/src/gui/widgets/ProjectNotes.cpp b/src/gui/widgets/ProjectNotes.cpp
index 6fac7320817..cfd607d2027 100644
--- a/src/gui/widgets/ProjectNotes.cpp
+++ b/src/gui/widgets/ProjectNotes.cpp
@@ -398,13 +398,18 @@ void ProjectNotes::loadSettings( const QDomElement & _this )
 
 void ProjectNotes::closeEvent( QCloseEvent * _ce )
 {
-	if( parentWidget() )
+	if (windowFlags().testFlag(Qt::Window))
+	{
+		_ce->accept();
+	}
+	else if (getGUI()->mainWindow()->workspace())
 	{
 		parentWidget()->hide();
+		_ce->ignore();
 	}
 	else
 	{
 		hide();
+		_ce->ignore();
 	}
-	_ce->ignore();
  }