Don't work connection open event

[Vladimir Amelin]

Hi. Don't work connection open event. My code:

_this.peer.on('connection', function(connn) {
        _this.conn = connn;
       
        if(_this.dataReceive == false) {
            _this.conn.on('open', function() {
                  // Receive messages
                _this.conn.on('data', function(data) {
                     
                    if(data == 'cancel_call') {
                          //_this.conn.close();    
                          $('#their-video').prop('src', null);
                          _this.connect = 'false';
                          _this.findPeople.findPeoplesAfterError(_this.peopleUserId,3);
                    }

i.e. work event connection. But sometimes don't work open event after making a connection.
Prompt please why don't work? Thanks