usesUntilPrompt not showing each 3rd time in AppRate Plugin

[VishnuV02]

In my ionic application, i gave usesUntilPrompt as 2, so it needs to be shown each and every 3rd attempt. Android it is working fine. But in iOS, alert is showing only once, after that nothing happening. Please help on this. Below is the code for reference,

ratingCompnd() {
this.appRate.preferences = {
// openStoreInApp: false,
displayAppName: this.translate.instant('RATING.01'),
usesUntilPrompt: 2,
promptAgainForEachNewVersion: true,
storeAppURL: {
ios: "itms-apps://itunes.apple.com/app/id671696873",
android: 'https://play.google.com/store/apps/details?id=com.io.Myapp'
},
customLocale: {
title: 'Thanks for being our \n Customer',
message: 'Kindly rate us in AppStore',
cancelButtonLabel: 'Cancel',
laterButtonLabel: 'Remind me later',
rateButtonLabel: "Rate Now'
// yesButtonLabel: "Yes!",
// noButtonLabel: "Not really",
// appRatePromptTitle: 'Do you like using %@',
// feedbackPromptTitle: 'Mind giving us some feedback?',
},
simpleMode: true,
useCustomRateDialog: true,
callbacks: {
onRateDialogShow: function (callback) {
console.log('rate dialog shown! : ' + callback);
// alert("rate dialog shown! : " + callback)
},
onButtonClicked: function (buttonIndex) {
console.log('Selected index: -> ' + buttonIndex);
// alert("Selected index: -> " + buttonIndex)
},
handleNegativeFeedback: function (data) {
console.log('negative feedback : -> ' + data);
// this.CONSTANTS.RATING_COUNT_RESET = data;
// alert("Negative feedback: -> " + data)
}
}
}

// Opens the rating immediately no matter what preferences you set


if (this.appRate.preferences) {
  alert("* App Rate reset *" + this.appRate.preferences)
   //this.appRate.preferences.usesUntilPrompt -= 1
}

this.appRate.promptForRating(false);

}