I have this weird construction where I have an array of many arrays with a single object of some certain shape inside, and I am not able to validate it, it allows for the empty first array no matter what, please have a look a this construct and tell me what I am doing wrong

yup.array().of(
        yup
            .array()
            .length(1)
            .of(
                yup.object().shape({
                    from: yup.string(),
                    to: yup.string(),
                    duration: yup.object().shape({
                        h: yup.number().nullable(),
                        m: yup.number().nullable()
                    }),
                    dates: yup.array().of(yup.string()),
                    weekDaysWithTime: yup.array().of(
                        yup.object().shape({
                            day: yup.string(),
                            time: yup.object().shape({
                                h: yup.number().nullable(),
                                m: yup.number().nullable()
                            })
                        })
                    )
                })
            )
    )

the shape I need to validate is basically

[
[{}],[{}],[{}]
]

and it allows for just one outer empty array [] to be validated.

Many thanks