message: Fix LocalEchoWrapper cache on falsey room ids
diff: @@ -39,7 +39,7 @@ export default class LocalEchoWrapper extends SettingsHandler {
  const cacheRoomId = roomId ? roomId : "UNDEFINED"; // avoid weird keys
  const bySetting = this._cache[settingName];
  if (bySetting && bySetting.hasOwnProperty(cacheRoomId)) {
  - return bySetting[roomId];
  + return bySetting[cacheRoomId];
  }
  return this._handler.getValue(settingName, roomId);
  