I have several programs used for digital delivery, each containing a default set of categories and parameters. Yes, these programs have been known to change my project parameters back to a default setting and sometimes to a different discipline.
These programs have their own parameter fields and synchronise data to and from the host environment. If you have something similar to this, I would investigate that.
It could be a user who hasn't configured their setup to your environment.
In terms of Revit out of the box environment, the transfer project settings is the only thing that could do this.