flink 双流join报错，java.lang.AssertionError

我使用flink 1.10.1 blink-planner。运行以下SQL时，抛出异常。其中A和B分别是两个Kafka消息流。任务使用processtime。如果我把join的B表的select 具体字段名 修改为 select *，貌似就可以执行。但是拿到的B表字段顺序貌似是错乱的。请问这个问题是bug么？

select A.recvTime, A.khh, A.live_id, A.fund_code as product_code, A.fund_name as product_name, cast(B.balance as double) as balance from ( select toLong(behaviorTime, true) as recvTime, user_id, cast(regexp_extract(btnTitle, 'zbid={([^|])}', 1) as int) as live_id, regexp_extract(btnTitle, 'fundname={([^|])}', 1) as fund_name, regexp_extract(btnTitle, 'fundcode={([^|]*)}', 1) as fund_code, proctime from kafka_zl_etrack_event_stream where pageId = 'xxxx' and eventId = 'click' and btnId = 'xxxx and CHARACTER_LENGTH(user_id) > 4 ) A left join ( select customerNumber, balance, fundCode, lastUpdateTime, proctime from lscsp_sc_order_all where status = '4' and businessType IN ('4','5','14','16','17','18') and fundCode IS NOT NULL and balance IS NOT NULL and lastUpdateTime IS NOT NULL ) B on A.user_id = B.customerNumber and A.fund_code = B.fundCode group by A.recvTime, A.user_id, A.live_id, A.fund_code, A.fund_name, cast(B.balance as double)

Exception in thread "main" java.lang.AssertionError at org.apache.calcite.sql2rel.SqlToRelConverter$Blackboard.getRootField(SqlToRelConverter.java:4448) at org.apache.calcite.sql2rel.SqlToRelConverter.adjustInputRef(SqlToRelConverter.java:3765) at org.apache.calcite.sql2rel.SqlToRelConverter.convertIdentifier(SqlToRelConverter.java:3737) at org.apache.calcite.sql2rel.SqlToRelConverter.access$2200(SqlToRelConverter.java:217) at org.apache.calcite.sql2rel.SqlToRelConverter$Blackboard.visit(SqlToRelConverter.java:4796) at org.apache.calcite.sql2rel.SqlToRelConverter$Blackboard.visit(SqlToRelConverter.java:4092) at org.apache.calcite.sql.SqlIdentifier.accept(SqlIdentifier.java:317) at org.apache.calcite.sql2rel.SqlToRelConverter$Blackboard.convertExpression(SqlToRelConverter.java:4656) at org.apache.calcite.sql2rel.StandardConvertletTable.convertCast(StandardConvertletTable.java:522) at org.apache.calcite.sql2rel.SqlNodeToRexConverterImpl.convertCall(SqlNodeToRexConverterImpl.java:63)

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