OrderBy pipe does not order when property is array of strings

[labenn]

[ x ] bug report
[ ] feature request

• Ngx-pipes version: 2.6.0

Current behavior
Array is not sorted when looking like this:
[
{arrayOfStrings: ['a', 'b']},
{arrayOfStrings: ['b']},
{arrayOfStrings: ['b', 'c']}
]
and used as | sortBy : [arrayOfStrings]

Expected behavior
It should sort similarly to array of numbers which does work. (which sorts by first element in array thx to javascript)

Minimal reproduction of the problem with instructions
https://stackblitz.com/edit/angular-ivy-v3ptad

Please tell us about your environment:
Win10, web browsers Firefox/Chrome

• Angular version: 8.2.3

• Node (for AoT issues): node --version = 12.14.1