Scheduler in Kubernetes runs twice in node application

I have an node application running in Kubernetes scheduled a job in node scheduler to run every day by midnight, but scheduler is running twice a day.

Kubernetes
Version - 1.21.5
Node - 13.0
Server
I have two nodes with an load balancer.

Update1

var scheduler = require('node-schedule');
function getRule() {
    var rule = new scheduler.RecurrenceRule();
    // rule.minute = new scheduler.Range(0, 59, 59);
    rule.hour = 23;
    rule.minute = 45;
    return rule;
}

exports.createSchedule = function () {
    var rule = getRule();
    scheduler.scheduleJob(rule, send1DayActivationReminderEmail);
};

This same set of code works in Heroku application, which runs only once.