diff --git a/app/public/config/config.example.js b/app/public/config/config.example.js
index 7909284..3126613 100644
--- a/app/public/config/config.example.js
+++ b/app/public/config/config.example.js
@@ -52,26 +52,36 @@ var config =
 		noiseSuppression : true,
 		sampleSize       : 16
 	},
-	background       : 'images/background.jpg',
-	defaultLayout    : 'democratic', // democratic, filmstrip
+
+	/**
+	 * Set the auto mute / Push To Talk threshold
+	 * default value is 4
+	 * 
+	 * Set it to 0 to disable auto mute functionality, 
+	 * but use it with caution
+	 * full mesh audio strongly decrease room capacity! 
+	 */
+	autoMuteThreshold : 4, 
+	background        : 'images/background.jpg',
+	defaultLayout     : 'democratic', // democratic, filmstrip
 	// If true, will show media control buttons in separate
 	// control bar, not in the ME container.
-	buttonControlBar : false,
+	buttonControlBar  : false,
 	// If false, will push videos away to make room for side
 	// drawer. If true, will overlay side drawer over videos
-	drawerOverlayed  : true,
+	drawerOverlayed   : true,
 	// Timeout for autohiding topbar and button control bar
-	hideTimeout      : 3000,
-	lastN            : 4,
-	mobileLastN      : 1,
+	hideTimeout       : 3000,
+	lastN             : 4,
+	mobileLastN       : 1,
 	// Highest number of speakers user can select
-	maxLastN         : 5,
+	maxLastN          : 5,
 	// If truthy, users can NOT change number of speakers visible
-	lockLastN        : false,
+	lockLastN         : false,
 	// Add file and uncomment for adding logo to appbar
 	// logo       : 'images/logo.svg',
-	title            : 'Multiparty meeting',
-	theme            :
+	title             : 'Multiparty meeting',
+	theme             :
 	{
 		palette :
 		{
diff --git a/app/src/RoomClient.js b/app/src/RoomClient.js
index 3d63d26..5086107 100644
--- a/app/src/RoomClient.js
+++ b/app/src/RoomClient.js
@@ -304,12 +304,18 @@ export default class RoomClient
 				{
 					case String.fromCharCode(37):
 					{
-						this._spotlights.setPrevAsSelected();
+						const newPeerId = this._spotlights.getPrevAsSelected(
+							store.getState().room.selectedPeerId);
+
+						if (newPeerId) this.setSelectedPeer(newPeerId);
 						break;
 					}
 					case String.fromCharCode(39):
 					{
-						this._spotlights.setNextAsSelected();
+						const newPeerId = this._spotlights.getNextAsSelected(
+							store.getState().room.selectedPeerId);
+							
+						if (newPeerId) this.setSelectedPeer(newPeerId);
 						break;
 					}
 					case 'A': // Activate advanced mode
@@ -2970,7 +2976,9 @@ export default class RoomClient
 					if (!this._muted)
 					{
 						await this.enableMic();
-						if (peers.length > 4) 
+						const { autoMuteThreshold } = store.getState().settings;
+
+						if (autoMuteThreshold && peers.length > autoMuteThreshold) 
 							this.muteMic();
 					}
 
@@ -3616,6 +3624,8 @@ export default class RoomClient
 
 		this._screenSharingProducer = null;
 
+		this._screenSharing.stop();
+
 		store.dispatch(meActions.setScreenShareInProgress(false));
 	}
 
diff --git a/app/src/Spotlights.js b/app/src/Spotlights.js
index 83e9905..10d6638 100644
--- a/app/src/Spotlights.js
+++ b/app/src/Spotlights.js
@@ -46,88 +46,72 @@ export default class Spotlights extends EventEmitter
 		}
 	}
 
-	setNextAsSelected()
+	getNextAsSelected(peerId)
 	{
-		let peerId = null;
+		let newSelectedPeer = null;
 
-		if (this._selectedSpotlights.length > 0) 
-		{
-			peerId = this._selectedSpotlights[0];
-		}
-		else if (this._unmutablePeerList.length > 0) 
+		if (peerId == null && this._unmutablePeerList.length > 0)
 		{
 			peerId = this._unmutablePeerList[0];
 		}
 
-		if (peerId != null && this._currentSpotlights.length < this._unmutablePeerList.length) 
+		if (peerId != null && this._currentSpotlights.length < this._unmutablePeerList.length)
 		{
 			const oldIndex = this._unmutablePeerList.indexOf(peerId);
 
 			let index = oldIndex;
-
+			
 			index++;
-			do 
+			for (let i = 0; i < this._unmutablePeerList.length; i++)
 			{
-				if (index >= this._unmutablePeerList.length) 
+				if (index >= this._unmutablePeerList.length)
 				{
 					index = 0;
 				}
-				const newSelectedPeer = this._unmutablePeerList[index];
-
-				if (!this._currentSpotlights.includes(newSelectedPeer)) 
+				newSelectedPeer = this._unmutablePeerList[index];
+				if (!this._currentSpotlights.includes(newSelectedPeer))
 				{
-					this.setPeerSpotlight(newSelectedPeer);
 					break;
 				}
 				index++;
-				if (index === oldIndex) 
-				{
-					break;
-				}
-			} while (true);
+			}
 		}
+
+		return newSelectedPeer;
 	}
 
-	setPrevAsSelected()
+	getPrevAsSelected(peerId)
 	{
-		let peerId = null;
+		let newSelectedPeer = null;
 
-		if (this._selectedSpotlights.length > 0) 
-		{
-			peerId = this._selectedSpotlights[0];
-		}
-		else if (this._unmutablePeerList.length > 0) 
+		if (peerId == null && this._unmutablePeerList.length > 0)
 		{
 			peerId = this._unmutablePeerList[0];
 		}
 
-		if (peerId != null && this._currentSpotlights.length < this._unmutablePeerList.length) 
+		if (peerId != null && this._currentSpotlights.length < this._unmutablePeerList.length)
 		{
 			const oldIndex = this._unmutablePeerList.indexOf(peerId);
 
 			let index = oldIndex;
-
+			
 			index--;
-			do 
+			for (let i = 0; i < this._unmutablePeerList.length; i++)
 			{
-				if (index < 0) 
+				if (index < 0)
 				{
 					index = this._unmutablePeerList.length - 1;
 				}
-				const newSelectedPeer = this._unmutablePeerList[index];
-
-				if (!this._currentSpotlights.includes(newSelectedPeer)) 
+				newSelectedPeer = this._unmutablePeerList[index];
+				if (!this._currentSpotlights.includes(newSelectedPeer))
 				{
-					this.setPeerSpotlight(newSelectedPeer);
 					break;
 				}
 				index--;
-				if (index === oldIndex) 
-				{
-					break;
-				}
-			} while (true);
+			}
 		}
+
+		return newSelectedPeer;
 	}
 
 	setPeerSpotlight(peerId)
diff --git a/app/src/components/Containers/Me.js b/app/src/components/Containers/Me.js
index 8d45473..b7edbf1 100644
--- a/app/src/components/Containers/Me.js
+++ b/app/src/components/Containers/Me.js
@@ -284,6 +284,25 @@ const Me = (props) =>
 			defaultMessage : 'Start screen sharing'
 		});
 	}
+	const [ 
+		screenShareTooltipOpen, 
+		screenShareTooltipSetOpen 
+	] = React.useState(false);
+
+	const screenShareTooltipHandleClose = () =>
+	{
+		screenShareTooltipSetOpen(false);
+	};
+
+	const screenShareTooltipHandleOpen = () =>
+	{
+		screenShareTooltipSetOpen(true);
+	};
+
+	if (screenState === 'off' && me.screenShareInProgress && screenShareTooltipOpen)
+	{
+		screenShareTooltipHandleClose();
+	}
 
 	const spacingStyle =
 	{
@@ -511,7 +530,11 @@ const Me = (props) =>
 									}
 								</Tooltip>
 								{ me.browser.platform !== 'mobile' &&
-									<Tooltip title={screenTip} placement='left'>
+									<Tooltip open={screenShareTooltipOpen} 
+										onClose={screenShareTooltipHandleClose} 
+										onOpen={screenShareTooltipHandleOpen} 
+										title={screenTip} placement='left'
+									>
 										{ smallContainer ?
 											<div>
 												<IconButton
diff --git a/app/src/reducers/settings.js b/app/src/reducers/settings.js
index 1c375bf..f810d3a 100644
--- a/app/src/reducers/settings.js
+++ b/app/src/reducers/settings.js
@@ -20,6 +20,7 @@ const initialState =
 	notificationSounds  : true,
 	buttonControlBar    : window.config.buttonControlBar || false,
 	drawerOverlayed     : window.config.drawerOverlayed || true,
+	autoMuteThreshold   : window.config.autoMuteThreshold || 4,
 	...window.config.defaultAudio
 };