I'm not react developer, but it seems that classes for active and inactive item in the list pane are different from version to version.
.msLiQ .sc-AxgMl etc.
I remove almost all styles from list pane via css file but i can't have permanent css for decorating active item.
I guess that those classes of active item are generated by react.
So i would request to make active class that is permanent between builds
like ".list-item-container .list-item-container-active"
I'm on v1.2.2