Ignore "bridgeIsDown" presence from non-focus members.

modules/xmpp/ChatRoom.js

     var jid = mucUserItem.attr('jid');
     member.jid = jid;
     member.isFocus
-        = !!jid && jid.indexOf(this.moderator.getFocusUserJid() + "/") === 0;
+        = jid && jid.indexOf(this.moderator.getFocusUserJid() + "/") === 0;
 
     member.isHiddenDomain
-        = !!jid && jid.indexOf("@") > 0
-            && this.options.hiddenDomain
+        = jid && jid.indexOf("@") > 0
             && this.options.hiddenDomain
                 === jid.substring(jid.indexOf("@") + 1, jid.indexOf("/"))
 
                 }
                 break;
             case "bridgeIsDown":
-                if(!this.bridgeIsDown) {
+                if (member.isFocus && !this.bridgeIsDown) {
                     this.bridgeIsDown = true;
                     this.eventEmitter.emit(XMPPEvents.BRIDGE_DOWN);
                 }