Issues with React Metronic Aside

Hello,

I'm having issues getting the aside in combination with the drawer to work properly for demo 1 react.

When reloading the website hard on a lg screen the sidenav has the classnames .drawer and .drawer-start causing the aside to be

.drawer.drawer-start {
 left: 0;
 transform: translateX(-100%);
}

and therefore not visible leaving an ugly white spot.

is there some kind of documentation for the data-kt-$ attributes?
how do i fix this issue?

Thanks a lot and ping me if you need further info!