Not sure if you have now solved this problem, as the post is quite old and I have just joined.
But I thought I would mention this, as I have had it happen recently using 0.2.4
When I accessed the Web Interface the server would shutdown, and the slug need rebooting.
I was using a Web favourite via IE to access the console, and somehow this has got alterred to default to the config page, and the libk to shut down the server.
Somehow when I accessed the URL, and logged in, the webpage refreshed and shutdown the server.
This sounds weird, I know, but by deleting the IE “Favourite” and accessing again by directly entering the IP address of the slug followed by the port 3869 all was ok again.