If you point directly to the full image collection of an artist instead of a subgallery, it only downloads the featured section (sometimes empty, usually not every image) instead of the all images category because the sanitizer filters out the "?catpath=/" part.
I coded a half-fix (it breaks the rip stopping on its own for a reason I can't figure out) that is here: Phenrei@8a68c79 (ignore the first change).
Short version of it is a quick regex to see if it's base directory or not, and if so keep the ?catpath=/ in all rip URLs. Feel free to clean up, fix my bug, and take all credit.