There have been a few reports and some confirmed bugs that were thought to be fixed regarding shutdown in Vangelis, the not released for production, available for test version.
Your options (possible upgrade targets) are:
Oram - production
Oram (Staging) - has fixes that may-will show up in Oram.
Vangelis - the test version, has some major changes that may not be finished yet and you may not be able to go back to Oram with a snapshot or update!
See the topic:
for more details. I pointed at the most recent post, scroll up of course to see much more (estimated read time 117 minutes!)