Track Removed and Create Duplicate Participant. (Blank Screen)

Hi, please help me.

I try using example from jitsi meet api (lib-jitsi-meet.min.js) but when partcipant has 3. Always error. I get 1 blank screen from remote video. When 3 participan, this code always execute too.

room.on(, track => {
    console.log(`track removed!!!${track}`);

How to fix it?