Device: iPad 4th gen
Os: iOS 9.2.1
So another lobby issues: if the original host (or at least the host at the moment you join) disconnects, the yellow "HOST" title doesn't switch to whoever then becomes host. Basically, for the rest of my time in that lobby, there was no clear host, although someone was indeed able to identify that they were host.
https://www.dropbox.com/s/qfa913ndwuw1isu/2016-04-01%2015.44.54.png?dl=0
Vs later
https://www.dropbox.com/s/9myq7hgtj8vkxxp/2016-04-01%2016.00.24.png?dl=0