sort 8.32 returns lines in demonstratebly incorrect order

[pd]

Running this command returns lines in unsorted order:
```
$ echo -e "k454__ii_andante\nk454__iii_allegretto\nk454__i_largo__allegro" | sort
k454__ii_andante
k454__iii_allegretto
k454__i_largo__allegro

$ sort --version | grep ^sort
sort (GNU coreutils) 8.32
```

The same works on a different system with sort 8.28 installed
```
$ echo -e "k454__ii_andante\nk454__iii_allegretto\nk454__i_largo__allegro" | sort
k454__i_largo__allegro
k454__ii_andante
k454__iii_allegretto

$ sort --version | grep ^sort
sort (GNU coreutils) 8.28

```

Description: Ubuntu 21.10
Release: 21.10