diff --git a/Linphone/core/camera/CameraGui.cpp b/Linphone/core/camera/CameraGui.cpp
index 6fdcc15fb..b83974647 100644
--- a/Linphone/core/camera/CameraGui.cpp
+++ b/Linphone/core/camera/CameraGui.cpp
@@ -99,6 +99,8 @@ QQuickFramebufferObject::Renderer *CameraGui::createRenderer(bool resetWindowId)
 					lInfo() << "[Camera] (" << qmlName << ") " << (resetWindowId ? "Resetting" : "Setting")
 					        << " Camera to ParticipantDeviceModel";
 					if (resetWindowId) {
+						renderer = (QQuickFramebufferObject::Renderer *)device->getNativeVideoWindowId();
+						if (renderer) device->setNativeVideoWindowId(NULL);
 					} else {
 						renderer = (QQuickFramebufferObject::Renderer *)device->createNativeVideoWindowId();
 						if (renderer) device->setNativeVideoWindowId(renderer);
diff --git a/Linphone/core/camera/PreviewManager.cpp b/Linphone/core/camera/PreviewManager.cpp
index c9059dfb5..88c36bbf6 100644
--- a/Linphone/core/camera/PreviewManager.cpp
+++ b/Linphone/core/camera/PreviewManager.cpp
@@ -66,15 +66,19 @@ QQuickFramebufferObject::Renderer *PreviewManager::subscribe(const CameraGui *ca
 	} else {
 		lDebug() << log().arg("Resubscribing") << itCandidate->first->getQmlName();
 	}
-	App::postModelBlock(
-	    [&renderer, isFirst = (itCandidate == mCandidates.begin()), name = itCandidate->first->getQmlName()]() {
-		    renderer =
-		        (QQuickFramebufferObject::Renderer *)CoreModel::getInstance()->getCore()->createNativePreviewWindowId();
-		    if (isFirst) {
-			    lDebug() << "[PreviewManager] " << name << " Set Native Preview Id";
-			    CoreModel::getInstance()->getCore()->setNativePreviewWindowId(renderer);
-		    }
-	    });
+	App::postModelBlock([&renderer, isFirst = (itCandidate == mCandidates.begin()),
+	                     name = itCandidate->first->getQmlName()]() {
+		renderer =
+		    (QQuickFramebufferObject::Renderer *)CoreModel::getInstance()->getCore()->createNativePreviewWindowId();
+		if (!renderer) { // TODO debug
+			renderer =
+			    (QQuickFramebufferObject::Renderer *)CoreModel::getInstance()->getCore()->createNativePreviewWindowId();
+		}
+		if (isFirst) {
+			lDebug() << "[PreviewManager] " << name << " Set Native Preview Id";
+			CoreModel::getInstance()->getCore()->setNativePreviewWindowId(renderer);
+		}
+	});
 	itCandidate->second = renderer;
 	mCounterMutex.unlock();
 	return renderer;
@@ -114,9 +118,9 @@ void PreviewManager::unsubscribe(QObject *sender) {
 }
 
 void PreviewManager::activate() {
-	App::postModelSync([]() { CoreModel::getInstance()->getCore()->enableVideoPreview(true); });
+	App::postModelBlock([]() { CoreModel::getInstance()->getCore()->enableVideoPreview(true); });
 }
 
 void PreviewManager::deactivate() {
-	App::postModelSync([]() { CoreModel::getInstance()->getCore()->enableVideoPreview(false); });
+	App::postModelBlock([]() { CoreModel::getInstance()->getCore()->enableVideoPreview(false); });
 }
diff --git a/Linphone/view/App/CallsWindow.qml b/Linphone/view/App/CallsWindow.qml
index a1d0a9ed7..7ab08f084 100644
--- a/Linphone/view/App/CallsWindow.qml
+++ b/Linphone/view/App/CallsWindow.qml
@@ -26,8 +26,9 @@ Window {
 		console.log("CALL", call)
 		// if conference, the main item is only
 		// displayed when state is connected
-		if (!conferenceInfo)
-			if (call && middleItemStackView.currentItem != inCallItem) middleItemStackView.replace(inCallItem)
+		if (call && middleItemStackView.currentItem != inCallItem
+			&& (!conferenceInfo || conference) )
+			middleItemStackView.replace(inCallItem)
 	}
 	property var callObj
 
diff --git a/Linphone/view/Item/Contact/Sticker.qml b/Linphone/view/Item/Contact/Sticker.qml
index 4728aa9eb..884f8b1e5 100644
--- a/Linphone/view/Item/Contact/Sticker.qml
+++ b/Linphone/view/Item/Contact/Sticker.qml
@@ -28,7 +28,7 @@ Item {
 										: null
 	property string peerAddress:peerAddressObj ? peerAddressObj.value : ""
 	property var identityAddress: account ? UtilsCpp.getDisplayName(account.core.identityAddress) : null
-	property bool cameraEnabled: previewEnabled
+	property bool cameraEnabled: previewEnabled || participantDevice && participantDevice.core.videoEnabled
 	property string qmlName
 
 	Rectangle {
@@ -79,7 +79,8 @@ Item {
 			Timer{
 				id: resetTimer
 				interval: 1
-				onTriggered: {cameraLoader.reset=true; cameraLoader.reset=false;}
+				triggeredOnStart: true
+				onTriggered: {cameraLoader.reset = !cameraLoader.reset}
 			}
 			active: mainItem.visible && mainItem.cameraEnabled && !mainItem.reset
 			onActiveChanged: console.log("("+mainItem.qmlName+") Camera active " + active)
@@ -100,12 +101,12 @@ Item {
 					participantDevice: mainItem.participantDevice
 					isPreview: mainItem.previewEnabled
 					onRequestNewRenderer: {
-						console.log("Request new renderer")
+						console.log("Request new renderer for " +mainItem.qmlName)
 						resetTimer.restart()
 					}
 					layer.enabled: true
 				}
-				
+
 				ShaderEffect {
 					id: roundEffect
 					property variant src: cameraItem
diff --git a/Linphone/view/Layout/Call/ActiveSpeakerLayout.qml b/Linphone/view/Layout/Call/ActiveSpeakerLayout.qml
index a59868921..910af64c6 100644
--- a/Linphone/view/Layout/Call/ActiveSpeakerLayout.qml
+++ b/Linphone/view/Layout/Call/ActiveSpeakerLayout.qml
@@ -31,7 +31,6 @@ Item{
 		
 		Sticker {
 			id: activeSpeakerSticker
-			//call: mainItem.call
 			Layout.fillWidth: true
 			Layout.fillHeight: true
 			call: mainItem.call
@@ -47,6 +46,7 @@ Item{
 				onTriggered: waitingTime.seconds += 1
 			}
 			ColumnLayout {
+				id: waitingConnection
 				anchors.horizontalCenter: parent.horizontalCenter
 				anchors.top: parent.top
 				anchors.topMargin: 30 * DefaultStyle.dp
@@ -90,15 +90,13 @@ Item{
 				Sticker {
 					visible: mainItem.callState != LinphoneEnums.CallState.End  && mainItem.callState != LinphoneEnums.CallState.Released
 					&& modelData.core.address != activeSpeakerSticker.address
-					onVisibleChanged: console.log(modelData.core.address)
 					height: visible ? 180 * DefaultStyle.dp : 0
 					width: 300 * DefaultStyle.dp
-					qmlName: 'M_'+index
+					qmlName: 'S_'+index
 					
 					participantDevice: modelData
-					cameraEnabled: mainItem.call.core.cameraEnabled
-					Component.onCompleted: console.log(modelData.core.address)
 					previewEnabled: index == 0
+					Component.onCompleted: console.log(qmlName + " is " +modelData.core.address)
 				}
 		}
 	}
@@ -106,7 +104,7 @@ Item{
 		id: preview
 		qmlName: 'P'
 		previewEnabled: true
-		visible: mainItem.call && allDevices.count <= 2
+		visible: mainItem.call && allDevices.count <= 2 && !waitingConnection.visible
 		onVisibleChanged: console.log(visible + " : " +allDevices.count)
 		height: 180 * DefaultStyle.dp
 		width: 300 * DefaultStyle.dp
@@ -143,230 +141,4 @@ Item{
 		}
 	}
 }
-	/*
-	Sticker {
-		id: preview
-		visible: mainItem.callState != LinphoneEnums.CallState.End
-			&& mainItem.callState != LinphoneEnums.CallState.Released
-		height: 180 * DefaultStyle.dp
-		width: 300 * DefaultStyle.dp
-		anchors.right: mainItem.right
-		anchors.bottom: mainItem.bottom
-		anchors.rightMargin: 10 * DefaultStyle.dp
-		anchors.bottomMargin: 10 * DefaultStyle.dp
-		AccountProxy{
-			id: accounts
-		}
-		account: accounts.defaultAccount
-		previewEnabled: mainItem.call.core.cameraEnabled
-
-		MovableMouseArea {
-			id: previewMouseArea
-			anchors.fill: parent
-			// visible: mainItem.participantCount <= 2
-			movableArea: mainItem
-			margin: 10 * DefaultStyle.dp
-			function resetPosition(){
-				preview.anchors.right = mainItem.right
-				preview.anchors.bottom = mainItem.bottom
-				preview.anchors.rightMargin = previewMouseArea.margin
-				preview.anchors.bottomMargin = previewMouseArea.margin
-			}
-			onVisibleChanged: if(!visible){
-				resetPosition()
-			}
-			drag.target: preview
-			onDraggingChanged: if(dragging) {
-				preview.anchors.right = undefined
-				preview.anchors.bottom = undefined
-			}
-			onRequestResetPosition: resetPosition()
-		}
-	}
-	
-	property int previousWidth
-	Component.onCompleted: {
-		previousWidth = width
-	}
-	onWidthChanged: {
-		if (width < previousWidth) {
-			previewMouseArea.updatePosition(0, 0)
-		} else {
-			previewMouseArea.updatePosition(width - previousWidth, 0)
-		}
-		previousWidth = width
-	}*/
-
-/*
-
-Item {
-	id: mainItem
-	property CallModel callModel
-	property bool isRightReducedLayout: false
-	property bool isLeftReducedLayout: false
-	property bool cameraEnabled: true
-	property bool isConference: callModel && callModel.isConference
-	property bool isConferenceReady: isConference && callModel.conferenceModel && callModel.conferenceModel.isReady
-	
-	property int participantCount: isConference ? allDevices.count + 1 : 2	// +me. allDevices==0 if !conference
-	
-	property ParticipantDeviceProxyModel participantDevices : ParticipantDeviceProxyModel {
-			id: allDevices
-			callModel: mainItem.callModel
-			showMe: false		
-			
-			onConferenceCreated: cameraView.resetCamera()
-		}
-	
-	Sticker{
-		id: cameraView
-		anchors.fill: parent
-		anchors.leftMargin: isRightReducedLayout || isLeftReducedLayout? 30 : 140
-		anchors.rightMargin: isRightReducedLayout ? 10 : 140
-		cameraQmlName: 'AS'
-		callModel: mainItem.callModel
-		currentDevice: isPreview
-							? allDevices.me
-							: mainItem.isConference
-								? allDevices.activeSpeaker
-								: null
-		deactivateCamera: !mainItem.cameraEnabled || (isPreview && callModel.pausedByUser)
-							? true
-							: mainItem.isConference
-								?  (callModel && (callModel.pausedByUser || callModel.status === CallModel.CallStatusPaused) )
-									|| (!(callModel && callModel.cameraEnabled) && mainItem.participantCount == 1)
-									|| (currentDevice && !currentDevice.videoEnabled)// && mainItem.participantCount == 2)
-									|| !mainItem.isConferenceReady
-								: (callModel && (callModel.pausedByUser || callModel.status === CallModel.CallStatusPaused || !callModel.videoEnabled) )
-									|| currentDevice && !currentDevice.videoEnabled
-		isPreview: !preview.visible && mainItem.participantCount == 1
-		onIsPreviewChanged: {cameraView.resetCamera() }
-		isCameraFromDevice: isPreview
-		isPaused: isPreview && callModel.pausedByUser
-					? false
-					: mainItem.isConference
-						? //callModel && callModel.pausedByUser && mainItem.participantCount != 2 || 
-							(currentDevice && currentDevice.isPaused)
-						: callModel && !callModel.pausedByUser && (callModel.status === CallModel.CallStatusPaused)
-		
-		quickTransition: true
-		showCloseButton: false
-		showActiveSpeakerOverlay: false	// This is an active speaker. We don't need to show the indicator.
-		showCustomButton:  false
-		avatarStickerBackgroundColor: isPreview ?  IncallStyle.container.avatar.stickerPreviewBackgroundColor.color : IncallStyle.container.avatar.stickerBackgroundColor.color
-		avatarBackgroundColor: IncallStyle.container.avatar.backgroundColor.color
-	}
-	Item{// Need an item to not override Sticker internal states. States are needed for changing anchors.
-		id: preview
-		anchors.right: parent.right
-		anchors.bottom: parent.bottom
-		anchors.rightMargin: 30
-		anchors.bottomMargin: 15
-		
-		height: visible ? miniViews.cellHeight : 0
-		width: 16 * height / 9
-		
-		visible: mainItem.isConferenceReady && allDevices.count >= 1
-				|| (!mainItem.isConference && mainItem.callModel && mainItem.callModel.cameraEnabled)// use videoEnabled if we want to show the preview sticker
-		
-		Loader{
-			anchors.fill: parent
-			anchors.margins: 3
-			sourceComponent: 
-			Sticker{
-				id: previewSticker
-				cameraQmlName: 'AS_Preview'
-				deactivateCamera: !mainItem.cameraEnabled || !mainItem.callModel || callModel.pausedByUser || !mainItem.callModel.cameraEnabled
-				currentDevice: allDevices.me
-				isPreview: true
-				callModel: mainItem.callModel
-				isCameraFromDevice:  true
-				showCloseButton: false
-				showCustomButton:  false
-				showAvatarBorder: true
-				avatarStickerBackgroundColor: IncallStyle.container.avatar.stickerPreviewBackgroundColor.color
-				avatarBackgroundColor: IncallStyle.container.avatar.backgroundColor.color
-			}
-			active: parent.visible
-		}
-		
-		MovableMouseArea{
-			id: dragger
-			anchors.fill: parent
-			visible: mainItem.participantCount <= 2
-			function resetPosition(){
-				preview.anchors.right = mainItem.right
-				preview.anchors.bottom = mainItem.bottom
-			}
-			onVisibleChanged: if(!visible){
-				resetPosition()
-			}
-			drag.target: preview
-			onDraggingChanged: if(dragging){
-				preview.anchors.right = undefined
-				preview.anchors.bottom = undefined
-			}
-			onRequestResetPosition: resetPosition()
-		}
-	}
-	
-	Item{
-		id: miniViewArea
-		anchors.right: parent.right
-		anchors.top: parent.top
-		anchors.bottom: preview.top
-		anchors.rightMargin: 30
-		anchors.topMargin: 15
-		anchors.bottomMargin: 0
-//---------------
-		width: 16 * miniViews.cellHeight / 9
-		visible: mainItem.isConferenceReady || !mainItem.isConference
-		property int heightLeft: parent.height - preview.height
-		onHeightLeftChanged: {Qt.callLater(miniViewArea.forceRefresh)}
-		function forceRefresh(){// Force a content refresh via margins. Qt is buggy when managing sizes in ListView.
-			++miniViewArea.anchors.topMargin
-			--miniViewArea.anchors.topMargin
-		}
-		
-		ScrollableListView{
-			id: miniViews
-			property int cellHeight: 150
-			anchors.fill: parent
-			model : mainItem.isConference && mainItem.participantDevices.count > 1 ? mainItem.participantDevices : []
-			spacing: 0
-			verticalLayoutDirection: ListView.BottomToTop
-			fitCacheToContent: false
-			property int oldCount : 0// Count changed can be called without a change... (bug?). Use oldCount to avoid it.
-			onCountChanged: {if(oldCount != count){ oldCount = count ; Qt.callLater(miniViewArea.forceRefresh)}}
-			Component.onCompleted: {Qt.callLater(miniViewArea.forceRefresh)}
-			delegate:Item{
-					height: visible ? miniViews.cellHeight + 15 : 0
-					width: visible ? miniViews.width : 0
-					visible: cameraView.currentDevice != modelData
-					clip:false
-					Sticker{
-						id: miniView
-						anchors.fill: parent
-						anchors.topMargin: 3
-						anchors.leftMargin: 3
-						anchors.rightMargin: 3
-						anchors.bottomMargin: 18
-						cameraQmlName: 'S_'+index
-						deactivateCamera: (!mainItem.isConferenceReady || !mainItem.isConference)
-											&& (index <0 || !mainItem.cameraEnabled || (!modelData.videoEnabled) || (callModel && callModel.pausedByUser) )
-						currentDevice: modelData.isPreview ? null : modelData
-						callModel: modelData.isPreview ? null : mainItem.callModel
-						isCameraFromDevice:  mainItem.isConference
-						isPaused: currentDevice && currentDevice.isPaused
-						showCloseButton: false
-						showCustomButton:  false
-						showAvatarBorder: true
-						avatarStickerBackgroundColor: IncallStyle.container.avatar.stickerBackgroundColor.color
-						avatarBackgroundColor: IncallStyle.container.avatar.backgroundColor.color
-					}
-				}
-		}
-	}
-}
-*/