Screen Sharing stream while answering a call has 3 tracks - (audio, camera and screen) but the call.on("stream", callback) receives only 2 tracks

[nayak2002]

I have developed a video conferencing app using vuejs for frontend, and peerjs for peer mesh connection.
The issue is that when a user starts to share their screen, all the users connected in the call receive the stream but when a new user joins while a user is sharing their screen then the screen share is not shown.

This is the stream I sent while answering the call from the new user, you can clearly see the 2 video tracks and the 1 audio track.

const screenShare = navigator.mediaDevices.getDisplayMedia(options);
screenShare.then((stream) => {
this.localUser.stream.addTrack(stream.getVideoTracks()[0]);

This is how I am adding the screen video track to the existing stream, before calling.
I have not given the entire codebase, but if you have any questions, Do ask!

These are the local tracks for the new user and tracks from the user answering the call.

As you can see I am sending 3 tracks while answering but I'm getting only 2 tracks for the new user.
I would really appreciate any recommendations/solutions.