Serenity: Step define are not displays on report when extend class different package

Question

I am using Serenity with junit5, i have defined step class as follow:

step class define

Two classes CommonStep and ShopStep not in same package

CommonStep.class

public class CommonStep {
    @Step("#actor this is step common")
    public void  testStep(){
        System.out.println("Hello CommonStep");
    }

ShopStep.class

public class ShopStep extends CommonStep {
 @Step("#actor this is step of ShopStep")
    public void testShopStep() {
        System.out.println("Hello ShopStep");
    }
}

In test file

@ExtendWith(SerenityJUnit5Extension.class)
@TestMethodOrder(MethodOrderer.OrderAnnotation.class)
public class TC_CreateShop{
    @Steps
    ShopStep I;

    @Test
    public void test(){
        I.testShopStep();
        I.testStep();
    }
}

It run correct but in report, all steps of CommonStep which extended by ShopStep is not displayed.

Report not display step

Note: If both CommonStep, and ShopStep in same package , all steps in report are displayed correctly