Just tried it out with version 796. Unfortunately it makes difference for the result: the installation fails for similar reasons. Although I could swear I lost about 10 to 12 GB of space on my SD card (the size of the game) and cleanup orphaned files didn't restore it this time. Hopefully I was just imagining that; didn't keep track well enough to be certain, i.e. pre-installation.
But that means we're back to having an XCI which pretends to be in pristine state by virtue of it's signature and hash, but it won't install because of errors. Considering that signature and hash checking are the cornerstone of validating NSP and XCI files, this is disconcerting in my opinion.