Yes it does, so you should grab the logs before rebooting if possible - from the sounds of it, you should still be able to do this without any issues . You can see details of how to grab the log files here.
That would be great - if you see it happen again, try changing some things on the Rossini (not via UPnP) like the filters, the input etc. to see if it is just the volume control not responding or if there is something else going on.
I’ll drop you an email around this.