diff --git a/linphone-app/src/app/proxyModel/ProxyModel.cpp b/linphone-app/src/app/proxyModel/ProxyModel.cpp
index 9734c7ff2..d47472a0c 100644
--- a/linphone-app/src/app/proxyModel/ProxyModel.cpp
+++ b/linphone-app/src/app/proxyModel/ProxyModel.cpp
@@ -35,6 +35,19 @@ ProxyModel::ProxyModel (QAbstractItemModel * model, const int& defaultFilterMode
 	sort(0, Qt::DescendingOrder);
 }
 
+ProxyModel::~ProxyModel(){
+	if(mDeleteSourceModel)
+		deleteSourceModel();
+}
+
+void ProxyModel::deleteSourceModel(){
+	auto oldSourceModel = sourceModel();
+	if(oldSourceModel) {
+		oldSourceModel->deleteLater();
+		setSourceModel(nullptr);
+	}
+}
+
 int ProxyModel::getFilterMode () const {
 	return mFilterMode;
 }
diff --git a/linphone-app/src/app/proxyModel/ProxyModel.hpp b/linphone-app/src/app/proxyModel/ProxyModel.hpp
index d85e950b8..a85bb45bb 100644
--- a/linphone-app/src/app/proxyModel/ProxyModel.hpp
+++ b/linphone-app/src/app/proxyModel/ProxyModel.hpp
@@ -35,6 +35,9 @@ public:
 	
 	ProxyModel (QObject *parent = Q_NULLPTR);
 	ProxyModel (QAbstractItemModel * list, const int& defaultFilterMode, QObject *parent = Q_NULLPTR);
+	virtual ~ProxyModel();
+	
+	virtual void deleteSourceModel();
 	
 	int getFilterMode () const;
 	void setFilterMode (int filterMode);
@@ -56,6 +59,8 @@ protected:
 	bool filterAcceptsRow (int sourceRow, const QModelIndex &sourceParent) const override;
 	bool lessThan (const QModelIndex &left, const QModelIndex &right) const override;
 	
+	bool mDeleteSourceModel = false;
+	
 private:
 	int mFilterMode;
 };
diff --git a/linphone-app/src/app/proxyModel/SortFilterProxyModel.cpp b/linphone-app/src/app/proxyModel/SortFilterProxyModel.cpp
index f60c5149f..cc4da2f43 100644
--- a/linphone-app/src/app/proxyModel/SortFilterProxyModel.cpp
+++ b/linphone-app/src/app/proxyModel/SortFilterProxyModel.cpp
@@ -26,6 +26,19 @@ SortFilterProxyModel::SortFilterProxyModel(QObject * parent) : QSortFilterProxyM
 	connect(this, &SortFilterProxyModel::rowsRemoved, this, &SortFilterProxyModel::countChanged);
 }
 
+SortFilterProxyModel::~SortFilterProxyModel(){
+	if(mDeleteSourceModel)
+		deleteSourceModel();
+}
+
+void SortFilterProxyModel::deleteSourceModel(){
+	auto oldSourceModel = sourceModel();
+	if(oldSourceModel) {
+		oldSourceModel->deleteLater();
+		setSourceModel(nullptr);
+	}
+}
+
 int SortFilterProxyModel::getCount() const{
 	return rowCount();
 }
diff --git a/linphone-app/src/app/proxyModel/SortFilterProxyModel.hpp b/linphone-app/src/app/proxyModel/SortFilterProxyModel.hpp
index 518593faa..e0df17682 100644
--- a/linphone-app/src/app/proxyModel/SortFilterProxyModel.hpp
+++ b/linphone-app/src/app/proxyModel/SortFilterProxyModel.hpp
@@ -30,6 +30,8 @@ public:
 	Q_PROPERTY(int filterType READ getFilterType WRITE setFilterType NOTIFY filterTypeChanged)
 	
 	SortFilterProxyModel(QObject * parent = nullptr);
+	virtual ~SortFilterProxyModel();
+	virtual void deleteSourceModel();
 	
 	virtual int getCount() const;
 	virtual int getFilterType () const;
@@ -47,6 +49,7 @@ signals:
 	
 protected:
 	int mFilterType;
+	bool mDeleteSourceModel = false;
 };
 
 #endif
diff --git a/linphone-app/src/components/chat-room/ChatRoomProxyModel.cpp b/linphone-app/src/components/chat-room/ChatRoomProxyModel.cpp
index 50526b763..fd37071b3 100644
--- a/linphone-app/src/components/chat-room/ChatRoomProxyModel.cpp
+++ b/linphone-app/src/components/chat-room/ChatRoomProxyModel.cpp
@@ -57,6 +57,7 @@ ChatRoomProxyModel::ChatRoomProxyModel (QObject *parent) : QSortFilterProxyModel
 }
 
 ChatRoomProxyModel::~ChatRoomProxyModel(){
+	setSourceModel(nullptr);
 	setChatRoomModel(nullptr);	// Do remove process like setting haveCall if is Call.
 }
 
diff --git a/linphone-app/src/components/conference/ConferenceProxyModel.cpp b/linphone-app/src/components/conference/ConferenceProxyModel.cpp
index a2a922a13..bf028b98b 100644
--- a/linphone-app/src/components/conference/ConferenceProxyModel.cpp
+++ b/linphone-app/src/components/conference/ConferenceProxyModel.cpp
@@ -38,6 +38,7 @@
 using namespace std;
 
 ConferenceProxyModel::ConferenceProxyModel (QObject *parent) : SortFilterProxyModel(parent) {
+  mDeleteSourceModel = false;
   setSourceModel(CoreManager::getInstance()->getCallsListModel());
   emit conferenceChanged();
 
diff --git a/linphone-app/src/components/other/timeZone/TimeZoneProxyModel.cpp b/linphone-app/src/components/other/timeZone/TimeZoneProxyModel.cpp
index 0d837c0a9..514a7f031 100644
--- a/linphone-app/src/components/other/timeZone/TimeZoneProxyModel.cpp
+++ b/linphone-app/src/components/other/timeZone/TimeZoneProxyModel.cpp
@@ -27,6 +27,7 @@
 // -----------------------------------------------------------------------------
 
 TimeZoneProxyModel::TimeZoneProxyModel (QObject *parent) : SortFilterProxyModel(parent) {
+	mDeleteSourceModel = true;
 	setSourceModel(new TimeZoneListModel(parent));
 	sort(0);
 }
diff --git a/linphone-app/src/components/participant/ParticipantDeviceProxyModel.cpp b/linphone-app/src/components/participant/ParticipantDeviceProxyModel.cpp
index 272c25480..b29b4c6bd 100644
--- a/linphone-app/src/components/participant/ParticipantDeviceProxyModel.cpp
+++ b/linphone-app/src/components/participant/ParticipantDeviceProxyModel.cpp
@@ -31,6 +31,10 @@
 // =============================================================================
 
 ParticipantDeviceProxyModel::ParticipantDeviceProxyModel (QObject *parent) : SortFilterProxyModel(parent){
+	mDeleteSourceModel = true;
+}
+
+ParticipantDeviceProxyModel::~ParticipantDeviceProxyModel(){
 }
 
 bool ParticipantDeviceProxyModel::filterAcceptsRow (
@@ -85,18 +89,20 @@ void ParticipantDeviceProxyModel::connectTo(ParticipantDeviceListModel* model){
 void ParticipantDeviceProxyModel::setCallModel(CallModel * callModel){
 	setFilterType(1);
 	mCallModel = callModel;
-	auto sourceModel = new ParticipantDeviceListModel(mCallModel);
-	connectTo(sourceModel);
-	setSourceModel(sourceModel);
+	deleteSourceModel();
+	auto newSourceModel = new ParticipantDeviceListModel(mCallModel);
+	connectTo(newSourceModel);
+	setSourceModel(newSourceModel);
 	emit countChanged();
 	emit meChanged();
 }
 
 void ParticipantDeviceProxyModel::setParticipant(ParticipantModel * participant){
 	setFilterType(0);
-	auto sourceModel = participant->getParticipantDevices().get();
-	connectTo(sourceModel);
-	setSourceModel(sourceModel);
+	deleteSourceModel();
+	auto newSourceModel = participant->getParticipantDevices().get();
+	connectTo(newSourceModel);
+	setSourceModel(newSourceModel);
 	emit countChanged();
 	emit meChanged();
 }
diff --git a/linphone-app/src/components/participant/ParticipantDeviceProxyModel.hpp b/linphone-app/src/components/participant/ParticipantDeviceProxyModel.hpp
index 9a939ac53..dfa0b885f 100644
--- a/linphone-app/src/components/participant/ParticipantDeviceProxyModel.hpp
+++ b/linphone-app/src/components/participant/ParticipantDeviceProxyModel.hpp
@@ -45,6 +45,7 @@ public:
 	Q_PROPERTY(ParticipantDeviceModel* activeSpeaker READ getActiveSpeakerModel NOTIFY activeSpeakerChanged)
 	
 	ParticipantDeviceProxyModel (QObject *parent = nullptr);
+	~ParticipantDeviceProxyModel();
 	
 	Q_INVOKABLE ParticipantDeviceModel* getAt(int row);
 	ParticipantDeviceModel* getActiveSpeakerModel();
@@ -76,7 +77,6 @@ protected:
 	virtual bool filterAcceptsRow (int sourceRow, const QModelIndex &sourceParent) const override;
 	virtual bool lessThan (const QModelIndex &left, const QModelIndex &right) const override;
 	
-	QSharedPointer<ParticipantDeviceListModel> mDevices;
 	CallModel * mCallModel;
 	bool mShowMe = true;
 };