Validator is duplicating error messages after Laravel 10 Upgrade

I recently upgraded to Laravel 10 and am now noticing on form submission the validator is returning pseudo duplicate error messages in the form of a messages and errors property. When before only the errors property was sent.

Calling the validator in the controller:

$this->getBookingValidator($request)->validate();

The Validator itself:

    protected function getBookingValidator(Request $request): \Illuminate\Contracts\Validation\Validator
    {
        return Validator::make($request->all(), [
            'name' => 'required',
            'started_at' => 'required',
            'ended_at' => 'required|after_or_equal:started_at',
        ]);
    }

Response:

{"message":"The ended at must be a date after or equal to started at.","errors":{"ended_at":["The ended at must be a date after or equal to started at."]}}

So on the F/E it's showing an undesirable "duplication", this is occurring across all validators and all controllers. I did go from Laravel 8 to 10 while skipping 9, does this remind anyone of anything?

I do notice the documentation is updated with (can't link on first day of sign up) but under validation and Validation Error Response Format it shows the json object I link above. Which makes me believe this is intended behaviour?

Thanks for any help.