To add to the previous answer, in addition to compact you can also use combined to get all the chains combined to compute the KDE (the default also changed from a single KDE to a KDE per chain) and chain_prop={"ls": "-"} there are examples of this in one of my blogposts.
You may also notice that in the previous version the right column plot also has only one line, result that can’t be reproduced anymore. This was a bug in the previous version when combining chains. In the right column plots, only the first chain was taken into account.