Server just had another hickup, not responding to pings for all players involved for about 30 seconds. Then the game continued "normally".
I would expect it to be OS or hoster related as application issues shouldn't result in ping failure.
http://stats.pingdom.com/ziv989e8cw4k/2668501/2017/05Shows 3 downtimes longer than a minute just in the last three days. Each of these is long enough to effectively kill the running games and cause Chobby to disconnect. Unless the game hosting can be moved to P2P, the server pretty much needs 100% uptime.