The wordbuilder part for Symphonic and Hollywood choirs is what was not working with Dorico for me.
Those hang up and do not cycle properly. My solution is to bridge Opus or Play6 through Bidule and then it works. For someone that doesn’t have Bidule, keep a copy of Play5 on the system and that works in Dorico for the choir wordbuilder. Play5 isn’t showing on the main website anymore, but the links are still good from the wayback engine and such. I’ve links to it here.