This is minimal reproducible example of issue that I encounter while working with HUGO.

Hugo starting from version 0.63.0 start occasionally producing different output when running hugo (without changing anything).

See this gif for example:

I split terminal here into 2 parts Right part of the terminal (one that is separated vertically) is running watch n1 'ls -al commands in public folder. When I'm running hugo command you can see how size of the file is changed. Note that not a single file was changed. I'm just constantly running hugo and receiving different output in public folder each time.

I'm using Hugo to generate php files.

After many rounds of testing I discover fue things:

• This starts happening in this release - https://github.com/gohugoio/hugo/releases/tag/v0.63.0. More specific - after this commit - https://github.com/gohugoio/hugo/commit/c6d650c8c8b22fdc7ddedc1e42a3ca698e1390d6

• It's probably related to partial that I use get_asset.php. Here it's content is:

{{ $stat :=  os.Stat ( printf "/files%v" . ) }}
{{- . -}}?{{- $stat.ModTime.Unix -}}

I know about fingerprinting and SRI available, but I'm using this partial because of the reason.

• This doesn't happen if I don't use isPlainText = true in config.toml

[outputFormats]
  [outputFormats.PHP]
    mediaType = "application/x-php"
    baseName = "index"
    isPlainText = true

• This doesn't happen if I have output formats other than php (If I have php and html layouts and outputs enabled everything works perfect)