How to fix VLC sorting playlist wrongly?

Scenario: VLC 3.08, the playlist have more than 20 tracks and is sorted as follow

1. VideoA
2. VideoB
(...)
11.VideoX
12.VideoY
(...)
20.Video Z
(...)

Problem: The sorting by title ends up like this

1. VideoA
11.VideoX
12.VideoY
(...)
2. VideoB
20.Video Z
(...)

How to sort by title properly without having to drag and drop every time I play a new playlist?