Replace elegant broken solution with ugly working one

    if (isRendered(img)) return // that was easy

    await new Promise((resolve, _) => {

        const observer = new MutationObserver((_, observer) => {

        const intervalId = setInterval(() => {

            if (isRendered(img)) {

                observer.disconnect()

                clearInterval(intervalId)

                resolve()

            }

        })

        observer.observe(img, { attributes: true })

        }, 10)

    })

}