The directories (and probably the files too, I didn't try) starting with uppercase letters are sorted first, which isn't supposed to happen on my system considering the $LC_COLLATE value I'm using.
A quick test with some directories containing lowercase and uppercase letters:

| Side |
Plugin |
Remark |
| Left |
Neo-tree |
❎ wrong sorting, directories with uppercase letters are sorted first |
| Right |
nvim-tree |
✔️ right sorting |
Can this be changed? I cannot see any relevant pref in defaults.lua
Cheers