diff --git a/Linphone/core/participant/ParticipantCore.cpp b/Linphone/core/participant/ParticipantCore.cpp
index e08c67791..8ba57b6f3 100644
--- a/Linphone/core/participant/ParticipantCore.cpp
+++ b/Linphone/core/participant/ParticipantCore.cpp
@@ -39,9 +39,10 @@ QSharedPointer<ParticipantCore> ParticipantCore::create(const std::shared_ptr<li
 }
 
 ParticipantCore::ParticipantCore(const std::shared_ptr<linphone::Participant> &participant) : QObject(nullptr) {
-	mustBeInLinphoneThread(getClassName());
+	if (participant) mustBeInLinphoneThread(getClassName());
 	App::getInstance()->mEngine->setObjectOwnership(this, QQmlEngine::CppOwnership);
 	mParticipantModel = Utils::makeQObject_ptr<ParticipantModel>(participant);
+	mParticipantModel->moveToThread(CoreModel::getInstance()->thread());
 	if (participant) {
 		mAdminStatus = participant->isAdmin();
 		mSipAddress = Utils::coreStringToAppString(participant->getAddress()->asStringUriOnly());
diff --git a/Linphone/core/participant/ParticipantList.cpp b/Linphone/core/participant/ParticipantList.cpp
index 14b27b921..007983186 100644
--- a/Linphone/core/participant/ParticipantList.cpp
+++ b/Linphone/core/participant/ParticipantList.cpp
@@ -137,11 +137,14 @@ std::list<std::shared_ptr<linphone::Address>> ParticipantList::getParticipants()
 }
 
 bool ParticipantList::contains(const QString &address) const {
-	auto testAddress = ToolModel::interpretUrl(address);
 	bool exists = false;
-	for (auto itParticipant = mList.begin(); !exists && itParticipant != mList.end(); ++itParticipant)
-		exists = testAddress->weakEqual(
-		    ToolModel::interpretUrl(itParticipant->objectCast<ParticipantCore>()->getSipAddress()));
+	App::postModelBlock([this, address, &exists, participants = mList]() {
+		auto testAddress = ToolModel::interpretUrl(address);
+		for (auto itParticipant = participants.begin(); !exists && itParticipant != participants.end(); ++itParticipant)
+			exists = testAddress->weakEqual(
+			    ToolModel::interpretUrl(itParticipant->objectCast<ParticipantCore>()->getSipAddress()));
+	});
+
 	return exists;
 }
 
@@ -184,4 +187,4 @@ void ParticipantList::addAddress(const QString &address) {
 		emit participant->lStartInvitation();
 		emit countChanged();
 	}
-}
\ No newline at end of file
+}
diff --git a/Linphone/model/participant/ParticipantModel.cpp b/Linphone/model/participant/ParticipantModel.cpp
index e5c068f25..9a7e77d5e 100644
--- a/Linphone/model/participant/ParticipantModel.cpp
+++ b/Linphone/model/participant/ParticipantModel.cpp
@@ -28,6 +28,7 @@ DEFINE_ABSTRACT_OBJECT(ParticipantModel)
 
 ParticipantModel::ParticipantModel(std::shared_ptr<linphone::Participant> linphoneParticipant, QObject *parent)
     : QObject(parent) {
+	if (linphoneParticipant) mustBeInLinphoneThread(getClassName());
 	mParticipant = linphoneParticipant;
 }
 
@@ -61,4 +62,4 @@ bool ParticipantModel::getAdminStatus() const {
 
 bool ParticipantModel::isFocus() const {
 	return mParticipant->isFocus();
-}
\ No newline at end of file
+}
diff --git a/Linphone/view/App/CallsWindow.qml b/Linphone/view/App/CallsWindow.qml
index 29f6cab21..de4926f45 100644
--- a/Linphone/view/App/CallsWindow.qml
+++ b/Linphone/view/App/CallsWindow.qml
@@ -732,11 +732,11 @@ Window {
 								Connections {
 									target: rightPanel
 									// TODO : chercher comment relier ces infos pour faire le add des participants
-									onValidateRequested: {
-										participantList.model.addAddresses(participantsStack.selectedParticipants)
-										participantsStack.pop()
-										participantsStack.participantAdded()
-									}
+									//onValidateRequested: {
+									//	participantList.model.addAddresses(participantsStack.selectedParticipants)
+									//	participantsStack.pop()
+									//	participantsStack.participantAdded()
+									//}
 								}
 							}
 						}
diff --git a/Linphone/view/Item/Call/WaitingRoom.qml b/Linphone/view/Item/Call/WaitingRoom.qml
index 17e9db995..3f99d08fb 100644
--- a/Linphone/view/Item/Call/WaitingRoom.qml
+++ b/Linphone/view/Item/Call/WaitingRoom.qml
@@ -93,10 +93,11 @@ RowLayout {
 			ColumnLayout {
 				spacing: 93 * DefaultStyle.dp
 				ColumnLayout {
-					spacing: 5 * DefaultStyle.dp
+					Layout.topMargin: 54 * DefaultStyle.dp
+					spacing: 0
 					Text {
 						Layout.fillWidth: true
-						text: qsTr("Participer à :\n")
+						text: qsTr("Participer à :")
 						color: DefaultStyle.grey_0
 						font {
 							pixelSize: 30 * DefaultStyle.dp
diff --git a/Linphone/view/Item/Contact/Sticker.qml b/Linphone/view/Item/Contact/Sticker.qml
index 0452a69a8..df6b5a757 100644
--- a/Linphone/view/Item/Contact/Sticker.qml
+++ b/Linphone/view/Item/Contact/Sticker.qml
@@ -52,15 +52,52 @@ Item {
 			anchors.fill: parent
 			spacing: 0
 			visible: !cameraLoader.active || cameraLoader.status != Loader.Ready || !cameraLoader.item.isReady
-			Avatar{
-				id: avatar
+			Item{
 				Layout.alignment: Qt.AlignHCenter
 				// minSize = 372 => avatar = 142
 				Layout.preferredHeight: background.minSize * 142 / 372
 				Layout.preferredWidth: height
-				account: mainItem.account
-				call: !mainItem.previewEnabled ? mainItem.call : null
-				address: mainItem.peerAddress
+				Avatar{
+					id: avatar
+					anchors.fill: parent	
+					visible: !joiningView.visible
+					account: mainItem.account
+					call: !mainItem.previewEnabled ? mainItem.call : null
+					address: mainItem.peerAddress
+				}
+				ColumnLayout{
+					id: joiningView
+					anchors.fill: parent
+					spacing: 0
+					visible: mainItem.participantDevice && (mainItem.participantDevice.core.state == LinphoneEnums.ParticipantDeviceState.Joining || mainItem.participantDevice.core.state == LinphoneEnums.ParticipantDeviceState.Alerting) || false
+					Item{
+						Layout.fillHeight: true
+						Layout.fillWidth: true
+					}
+					BusyIndicator {
+						Layout.preferredHeight: 27 * DefaultStyle.dp
+						indicatorColor: DefaultStyle.main2_100
+						Layout.alignment: Qt.AlignHCenter
+						indicatorHeight: 42 * DefaultStyle.dp
+						indicatorWidth: 42 * DefaultStyle.dp
+					}
+					Text {
+						Layout.preferredHeight: 27 * DefaultStyle.dp
+						Layout.topMargin: 15 * DefaultStyle.dp // (84-27)-42
+						text: qsTr('rejoint...')
+						color: DefaultStyle.grey_0
+						Layout.alignment: Qt.AlignHCenter
+						horizontalAlignment: Text.AlignHCenter
+						font {
+							pixelSize: 20 * DefaultStyle.dp
+							weight: 500 * DefaultStyle.dp
+						}
+					}
+					Item{
+						Layout.fillHeight: true
+						Layout.fillWidth: true
+					}
+				}
 			}
 			Text {
 				Layout.fillWidth: true
diff --git a/Linphone/view/Layout/Meeting/AddParticipantsLayout.qml b/Linphone/view/Layout/Meeting/AddParticipantsLayout.qml
index b185e9ae7..ac2589e15 100644
--- a/Linphone/view/Layout/Meeting/AddParticipantsLayout.qml
+++ b/Linphone/view/Layout/Meeting/AddParticipantsLayout.qml
@@ -16,7 +16,8 @@ ColumnLayout {
 	readonly property string groupName: groupCallName.text
 
 	function clearSelectedParticipants() {
-		contactList.selectedContacts.clear()
+		// TODO
+		//contactList.selectedContacts.clear()
 	}
 	
 	ColumnLayout {
@@ -155,4 +156,4 @@ ColumnLayout {
 	Item {
 		Layout.fillHeight: true
 	}
-}
\ No newline at end of file
+}