moment.js - diff in minutes returns incorrect value

Question

I have two variable populated with datetime - one containing value from cookie (utc), the otherone containing current time in utc:

var expiration = moment(Date.parse($.cookie("ecookie"))); 
var current = moment().utc();

console.log(current.format('MMMM Do YYYY, h:mm:ss a'));
console.log(expiration.format('MMMM Do YYYY, h:mm:ss a'));

output showing values in variables:

May 20th 2022, 2:17:37 pm

May 20th 2022, 3:14:11 pm

Why is the diff method returning value 63 (time difference in minutes) ?:

current.diff(expiration, "minutes") // 63

It should be under 60 minutes. What piece am I missing ?

EDIT:

Storing the cookie value in ISO 8601 format solves the issue