Update

src/state/manager.go

@@ -529,6 +529,10 @@ func (m *Manager) marshalRoomState(room *Room, viewerParticipantID string) ([]by
 
 	participants := make([]PublicParticipant, 0, len(room.Participants))
 	for _, participant := range sortParticipants(room.Participants) {
+		if !participant.Connected {
+			continue
+		}
+
 		public := PublicParticipant{
 			ID:        participant.ID,
 			Username:  participant.Username,