'False' servers showing up in Find Matchmaking Sessions

We've been having this issue where after a player joins a multiplayer match, he will sometimes leave or crash or otherwise become disconnected.  When he or other players then try to join a match, the player who disconnected actually shows up in the server list as *hosting* a match.  The FindMatchmakingSessions node is returning a non-working session result with the name of that disconnected player for the name of the server.

Anyone else seen this?  Is that a bug, and is there any way to detect that it is a bad server?  The session result doesn't seem to provide any other information than NumPlayers, MaxPlayers, Server Name and ping.  Maybe I can check the ping, idk, but it seems like a poor solution...