Spring @ComponentScan doesn't work inside @Import in Spring

I use spring 5.2.8 and I have three annotation configs:

@Configuration
@ComponentScan(basePackageClasses = {
    Foo.class
})
public class AConfig {

     @Bean
     public Something something() {..}
}

@Configuration
@ComponentScan(basePackageClasses = {
    Bar.class
})
public class BConfig {}

@Configuration
@Import({ AConfig.class, BConfig.class })
public class MainConfig {}

This is the way I start my spring context:

ApplicationContext applicationContext = new AnnotationConfigApplicationContext(MainConfig.class);

The problem with such configuration is that spring doesn't see/initialize/scan beans in the packages of base package classes. In log I see only

[TRACE] org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader - Registering bean definition for @Bean

Is this a bug or expected behavior?

Comment From: snicoll

AFAIK, this should work. Can you move that code snippet in a project that we can run ourselves?

You can share it with us by attaching a zip to this issue or sharing a link to a GitHub repository.

Comment From: PavelTurk

The problem was that I had to set classLoader for AnnotationConfigApplicationContex manually as PathMatchingResourcePatternResolver didn't find my config classes.