We noticed this and spent a week or two going through and cleaning up tests, UI components, comments, and file layout to be a lot more consistent throughout the codebase. Codebase was not all AI written code - just many humans being messy and inconsistent over time as they onboard/offboard from the project.

Much like giving a codebase to a newbie developer, whatever patterns exist will proliferate and the lack of good patterns means that patterns will just be made up in an ad-hoc and messy way.