Hiera: Session/session.save_path Change will not recognized

Affected Puppet, Ruby, OS and module versions/distributions

• Puppet: 7.12.1
• Ruby: ruby 2.7.3p183
• Distribution: Ubuntu 20.04
• Module version: 8.1.1

How to reproduce (e.g Puppet code you use)

I changed the in my hiera

settings.Session/session.save_path

to another value.

What are you seeing

When i run puppet agent on a node i see there there are no changes.

What behaviour did you expect instead

When i change the session-Var it should be recognized and be deployed by puppet agent

Output log

Info: Using environment 'production'
Info: Retrieving pluginfacts
Info: Retrieving plugin
Info: Loading facts
Info: Caching catalog for xxx
Info: Applying configuration version '1665248799'
Notice: Applied catalog in 6.82 seconds

Any additional information you'd like to impart

I use the following code:

lookup_options:
  my_service::php_config:
    merge:
      strategy: deep
      merge_hash_arrays: true

my_service::sessions_save_path: "\"/tmp/myfunnysavepath\""

'Session/session.save_path': "%{lookup('my_service::sessions_save_path')}"

class { '::php':
   * => $php_hiera_config,
}

No files or tests are named. Start by reproducing the Hiera change with Puppet 7.12.1, Ruby 2.7.3, Ubuntu 20.04, and module 8.1.1, then trace how the PHP configuration hash is applied. Done means a changed Session/session.save_path value is detected and deployed by puppet agent.