通过DataDownloader和get_kline_serial返回2023-04-07期货指数/主连的夜盘数据异常

2023-04-07有夜盘，但是通过DataDownloader和get_kline_serial返回2023-04-07期货指数夜盘成交量都为0，显示如下：

品种1：KQ.i@SHFE.rb的30分钟：

2023-04-07 21:00:00.000000000,1680872400000000000,3999.0,3999.0,3999.0,3999.0,0,2901915,2901915
2023-04-07 21:30:00.000000000,1680874200000000000,3999.0,3999.0,3999.0,3999.0,0,2901915,2901915
2023-04-07 22:00:00.000000000,1680876000000000000,3999.0,3999.0,3999.0,3999.0,0,2901915,2901915
2023-04-07 22:30:00.000000000,1680877800000000000,3999.0,3999.0,3999.0,3999.0,0,2901915,2901915

品种2：KQ.i@SHFE.ru的30分钟

2023-04-07 14:30:00.000000000,1680849000000000000,11577.0,11595.0,11559.0,11595.0,28163,408959,405942
2023-04-07 21:00:00.000000000,1680872400000000000,11595.0,11595.0,11595.0,11595.0,0,405942,405942
2023-04-07 21:30:00.000000000,1680874200000000000,11595.0,11595.0,11595.0,11595.0,0,405942,405942
2023-04-07 22:00:00.000000000,1680876000000000000,11595.0,11595.0,11595.0,11595.0,0,405942,405942
2023-04-07 22:30:00.000000000,1680877800000000000,11595.0,11595.0,11595.0,11595.0,0,405942,405942

还有其他品种（包括相应的主连合约）也有该问题，这里就不一一列举了。