bug in pyodps join

[SSW-Talon]

bug in pyodps join:
When I join 2 tables and count the total number of table, everything seems ok.
But if I show some data (like head(5) ), the table will lose some data in table.
I am not sure anyone have meet this problem?

感觉这个join有问题，尤其是其中有一个表有几百万或者上千万的时候，如果用pyodps中的join另一个表，然后head(5)展示一下数据，就会出现数据少的问题，不知道为啥。