The initrd is the last thing that happens on that image. There is a log... It should have tried (and failed) to reboot after that, displaying (and hanging) on the shutdown bootsplash. Pressing enter should have competed the reboot.
There is a snap that came out today that needs to be tested, but ALL of those weird issues should be resolved. The snapshots are VERY experimental on a pre-alpha release. Typically I will want to see your logs, but so much has changed since then, I am not sure they would be relevant. I am more curious about your hardware, as everyone has had decent luck with that particular .iso. Can you please detail the machine it ran on? Also, was an internet connection available to that machine during this install?