OmniFaces not destroying ViewScoped bean after closing tab/window - jsf

Question

I have a simple jsf app with one Bean.
import org.omnifaces.cdi.ViewScoped;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.inject.Named;
import java.io.Serializable;
#Named
#ViewScoped
public class IndexMg implements Serializable {
List list;
#PostConstruct
public void init() {
list = new ArrayList();
list.add("as");
list.add("dsu");
}
#PreDestroy()
public void end() {
System.out.println("predestroy called");
}
}
according to this answer and conversation down this post and also OmniFaces documentation OmniFaces ViewScoped bean should invoke #PreDestroy function when I navigate away by GET, or close the browser tab/window but nothings happens until session destroy.
I'm using Wildfly 15 as Application Server and i can see activeViewMaps in sessions. Yoy can see sessions content here .
It's something like this :
com.sun.faces.application.view.activeViewMaps {1d31c745-c202-4256-a2c6-60035bfdd8e7={org.omnifaces.cdi.viewscope.ViewScopeStorageInSession=b557d2aa-ba35-4ff2-9f4e-3cc4ac312c9a}, ca02df9d-be65-4a75-a399-3df9eabbcfd3={org.omnifaces.cdi.viewscope.ViewScopeStorageInSession=aaef6a5a-d385-4e33-a990-200f94b67583}}
I opened multiple windows an closed them but non of them destroyed until session destroy(30 minutes later). What's wrong? did i forget anything?
this is my pom
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.source>1.8</maven.compiler.source>
</properties>
<dependencies>
<dependency>
<groupId>org.glassfish</groupId>
<artifactId>javax.faces</artifactId>
<version>2.3.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.enterprise/cdi-api -->
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>2.0.SP1</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.omnifaces/omnifaces -->
<dependency>
<groupId>org.omnifaces</groupId>
<artifactId>omnifaces</artifactId>
<version>3.2</version>
</dependency>
</dependencies>