Safari 12 Array.prototype.reverse bug

array_reverse.js

let fn = () => {
  let array = [1, 2, 3, 4, 5]
  console.log(array)
  array.reverse()
}

fn() // => [1, 2, 3, 4, 5]
fn() // I expect to be `[1, 2, 3, 4, 5]`, but in the case of Safari 12 it will be `[5, 4, 3, 2, 1]`

array_reverse2.js

let fn = (array) => {
  console.log(array)
  array.reverse()
}

fn([1, 2, 3, 4, 5]) // => [1, 2, 3, 4, 5]
fn([1, 2, 3, 4, 5]) // I expect to be `[1, 2, 3, 4, 5]`, but in the case of Safari 12 it will be `[5, 4, 3, 2, 1]`