Hidden members of base class are documented in derived class

[varstyx]

Describe the bug
Hidden members of a base class get printed in the documentation of a derived class.
This happens if the member has @suppress or is internal/protected/private and includeNonPublic is set to false.

Expected behaviour
Hidden members should also not show up in derived classes.

Minimal example

open class Base {
    private val a: Int = 0
}

class Derived : Base() {

}

Screenshots

Dokka configuration
Configuration of dokka used to reproduce the bug:

tasks.withType<DokkaTask>().configureEach {
    dokkaSourceSets {
        named("main") {
            includeNonPublic.set(false)

            reportUndocumented.set(true)
        }
    }
}

Installation

• Operating system: Linux
• IDE: Android Studio 4.0.1
• Build tool: Gradle v6.1.1
• Dokka version: 1.4.0 (also tested with 1.4.10-dev-69)