diff --git a/host/bins/cfc-0.1.0-x64.deb b/host/bins/cfc-0.1.0-x64.deb
index aea5b4d..e4d91a9 100644
Binary files a/host/bins/cfc-0.1.0-x64.deb and b/host/bins/cfc-0.1.0-x64.deb differ
diff --git a/host/src/pack/dpkg/opt/cfc/mwc/bin/kill_lg_instance.sh b/host/src/pack/dpkg/opt/cfc/mwc/bin/kill_lg_instance.sh
index 71becac..c34193b 100755
--- a/host/src/pack/dpkg/opt/cfc/mwc/bin/kill_lg_instance.sh
+++ b/host/src/pack/dpkg/opt/cfc/mwc/bin/kill_lg_instance.sh
@@ -18,7 +18,7 @@ else
    pid=`ps aux | grep "LG_B1_Client " | grep -v grep | grep $inst | awk '{print $2}'`
 fi
 
-if [ "$pid" -gt 0 ]
+if [ ! -z "$pid" ] && [ "$pid" -gt 0 ]
 then
     echo  "inside kill"	
     kill -KILL $pid
diff --git a/host/src/pack/dpkg/opt/cfc/mwc/bin/lg_launcher.sh b/host/src/pack/dpkg/opt/cfc/mwc/bin/lg_launcher.sh
index 7c7fdce..18a0cd6 100755
--- a/host/src/pack/dpkg/opt/cfc/mwc/bin/lg_launcher.sh
+++ b/host/src/pack/dpkg/opt/cfc/mwc/bin/lg_launcher.sh
@@ -62,6 +62,14 @@ fi
 
 $FOLDER_1_UPDATE
 $FOLDER_2_UPDATE
+
+num_app_process=`ps aux | grep "mwc_launcher.* $1 $2" | grep -v grep | wc -l`
+if [ ! "$num_app_process" -lt "1" ];
+then
+    echo "The app process is already running, skip the app launch!"
+    exit 0
+fi
+
 /opt/cfc/mwc/bin/mwc_launcher localhost 3000 $@
 
 echo "appname:$1, previous_app:$previous_app"
diff --git a/host/src/pack/dpkg/opt/cfc/mwc/bin/loadapp.sh b/host/src/pack/dpkg/opt/cfc/mwc/bin/loadapp.sh
index 89ce37f..85d584f 100755
--- a/host/src/pack/dpkg/opt/cfc/mwc/bin/loadapp.sh
+++ b/host/src/pack/dpkg/opt/cfc/mwc/bin/loadapp.sh
@@ -60,6 +60,18 @@ function configure_wm_density()
 
 configure_wm_density
 
+# Kill the looking glass client with same slot id.
+# This is to avoid messed looking glass slot allocation status.
+lg_pids=`ps aux | grep "LG_B1_Client.*looking-glass$3" | grep -v grep | awk '{print $2}'`
+
+echo "Looking-glass client pid:$lg_pids"
+if [ ! -z "$lg_pids" ];
+then
+    echo "Kill looking-glass client pid: $lg_pids"
+    kill -KILL $lg_pids
+    sleep 1
+fi
+
 if [ "$1" = "com.tencent.mm" ];
 then
     adb -s vsock:3:5555 shell am start -W -S -n $2 --display $3 --activity-no-animation
diff --git a/host/src/pack/dpkg/opt/cfc/mwc/bin/mwc_hostdaemon b/host/src/pack/dpkg/opt/cfc/mwc/bin/mwc_hostdaemon
index 0df5605..014025b 100755
Binary files a/host/src/pack/dpkg/opt/cfc/mwc/bin/mwc_hostdaemon and b/host/src/pack/dpkg/opt/cfc/mwc/bin/mwc_hostdaemon differ
diff --git a/host/src/pghost/vatclient.cpp b/host/src/pghost/vatclient.cpp
index 368f399..5c3e85b 100644
--- a/host/src/pghost/vatclient.cpp
+++ b/host/src/pghost/vatclient.cpp
@@ -433,6 +433,9 @@ int VatClient::HandleEvent(Event* event)
 		if (ret >=0) {
 		    slot_id = lg_slot;
 		}
+                else {
+                    slot_id = -1;
+                }
 	    }
 	    for (int i=0; i<NUM_LG_SLOTS; i++) {
 		printf("slot:%d, status:%d, appname:%s, activity:%s\n", i, m_lg_slots[i]->slot_status, m_lg_slots[i]->appname, m_lg_slots[i]->activity);
@@ -449,7 +452,11 @@ int VatClient::HandleEvent(Event* event)
 		if (LGSLOT_USED == m_lg_slots[i]->slot_status) {
 		    char* launched_appname = m_lg_slots[i]->appname;
 		    if (strstr(launched_appname, appname)) {
-                        m_lgslot->SetLGSlotIdle(i);
+                        // Set the slot_id to -1 to avoid unexpected slot state update.
+                        slot_id = -1;
+                        // Don't set the slot to idle here. Let the process opened looking glass
+                        // to communicate with daemon for the graceful shutdown.
+                        // m_lgslot->SetLGSlotIdle(i);
                         kill_lg_process = 1;
 			slot_found = i;
 			break;
@@ -532,6 +539,7 @@ int VatClient::HandleEvent(Event* event)
 		    (char*) ";");
 	    lg_slot = atoi(lg_instance_id);
 	    if (lg_slot >=0 && lg_slot < NUM_LG_SLOTS) {
+                slot_id = -1;
 		m_lgslot->SetLGSlotIdle(lg_slot);
 	    }
 	    running = 0;
@@ -594,8 +602,9 @@ void VatClient::CleanUp()
     delete m_launcherconnmgr;
 
     if (slot_id >=0 && slot_id < NUM_LG_SLOTS) {
-        if (LGSLOT_USED == m_lg_slots[slot_id]->slot_status) {
+        if (LGSLOT_IDLE != m_lg_slots[slot_id]->slot_status) {
 	    m_lgslot->SetLGSlotIdle(slot_id);
+            slot_id = -1;
 	}
     }
 }