how to prevent added meta box from being injected with style=”position: fixed; top: 56px;” at scroll down

I found a temporary workaround by doing this

<style>
div #my_meta_box {
    background: #c0cdd7;
    position: relative !important;
    z-index: initial;
}
div #submitdiv {
    z-index: initial;
}
#postbox-container-2 {
    width: calc(100% - 300px)  !important;;
}
#wpfooter {
    display: none;
}
</style>