when i set the alias to 'n' in yaml frontmatter like so:

---
aliases:
- n
---

the folder 'n' is not created in the public directory. it works with toml, absolute '/n' and somehow like this too:

---
aliases: ['n']
---

i tested other letters, they all seem to work, except for the letter 'n'

What version of Hugo are you using (hugo version)?

$ hugo version
$ hugo v0.151.1-1cdd17882c28a9f23278d38ef03b403954cfb1e5 openbsd/amd64 BuildDate=2025-10-15T14:51:34Z VendorInfo=gohugoio

Does this issue reproduce with the latest release?

yes