No idea - I downloaded the 1.3.2 image, wrote it to a new card, and plugged it in. It is possible I rebooted at the wrong time, but no reason that the ssh_host files on the system would have timestamps for March (rather than July), and a zero size.
But, it could have been me. Either way, this fix worked for me. And may help others.
I’d raise a possible issue against the project on github, but there isn’t an issues tag.