Echo issue while sharing screen with audio using screenCaptureAPI(getDisplayMedia)

We are implementing sharing screen with audio using Screen Capture API(getDisplayMedia) by using JavaScript. To get the requested screen we passed the below constraints in getDisplayMedia(constraints),

constraints = {audio: {echoCancellation:true,echoCancellationType:'browser',autoGainControl:true,noiseSuppression:true}, video: true};

then we shared promised stream via webRTC,

Let’s consider A and B users are there,
A is sharing the screen and screen got shared to B via webRTC
then user B is getting ECHO issue(while talking to user A),

Note: if user A share specific tab/window screen then ECHO is not there at user B(while talking to user A)

We are using getDisplayMedia(constraints) like below,

if (navigator.mediaDevices.getDisplayMedia) {
       navigator.mediaDevices.getDisplayMedia(constraints).then(function (stream) { /*adding stream to webRTC and sharing to user B*/ }, function (error) { /*handling errors*/ });
} else {
       navigator.getDisplayMedia(constraints).then(function (stream) { /*adding stream to webRTC and sharing to user B*/ },function (error) { /*handling errors*/ });
}

Any help would be appreciated. Thanks.