Variable Products initializing intlTelInput issue

Hi,

intlTelInput is not initializing for Out Of Stock Variations and Form is not working. It’s occurring when you are changing variations on Frontend. I fixed it with adding a setTimeout. Please check this fix and implement if evrything is okay.

Current code – https://plugins.trac.ww.wp.xz.cn/browser/back-in-stock-notifier-for-woocommerce/trunk/assets/js/frontend-dev.js#L69:

if (phone_field == '1') {
	instock_notifier.initialize_phone();
}

Fixed version:

if (phone_field == '1') {
	setTimeout(function () {
		instock_notifier.initialize_phone();
	}, 100);
}