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

hugo v0.88.0-DEV-7A15EDAF+extended linux/amd64 BuildDate=2021-08-23T20:18:48+0700

Does this issue reproduce with the latest release?

Yes, it's build latest from source.

Project Structure

I have my-theme as symbolic link.

config.yaml
content/
themes/
  my-theme/ --> Symbolic Link

Bug

If you change anything under my-theme directory, Hugo detect the modification (trigger rebuild) but didnt't grab the changes of file content.

Workaround

I downgraded fsnotify to 1.4.9, everything works perfectly.