local and shared folders inconsistencies (Windows and Mac)

Are there inconsistencies in the execution of rules in folders shared between Windows and Mac?
Why does this happen?
I have exactly the same rules for local folders and folders shared with Windows PCs. Locally they work very well, but in the shared folder they are inconsistent. For example:
I have a rule that extracts content and puts it in the 'comments' attribute. Locally it always works, but in shared folders it works for some files and not for others. Is this a known error?

Are these shared folders hosted on a Mac or PC? What filesystem are they formatted as? What protocol are you using to share them?

Hi, Thank u for your response. Is hosted on Windows. All them PDF's. And SMB.

My guess is that Windows does not support some features that the Mac does, like comments.