In k8s, Interactive session's library on spark 3.0.2, classes in packages cannot be imported

In my k8s enviroment, Interactive session's library on spark 3.0.2, classes in packages are cannot imported.

I will try to use livy binary packages below,

1) 0.7.0: binaries in AWS EMR 6.3.0 (for using scala 2.12)

2) 0.8.0-SNAPSHOT: 

https://github.com/jahstreet/incubator-livy

3) spark 3.0.2: 

• using client mode: https://github.com/apache/spark/tree/v3.0.2

• using cluster mode:  https://github.com/apache/spark/pull/32397

ln jupyter notebook with spark magic, configure is that

%%configure -f
{...
 ...
 "conf": {"spark.jars.packages": "mypackages" }
 ...
}

The error is raised when importing some class,

import com.mypackage.test

An error aws encounted:
<console>:23:error: object mypackage is not a member of package com
    import com.mypackage.test

However, it is no problem that calling class by name 

Class.forName(com.mypackage.test)

It is only occured in livy interactive session.

livy batch, spark-submit and spark-shell  have no problem about it.