ActionGroup is disabled. Why?

https://github.com/JetBrains/intellij-community/blob/master/platform/platform-impl/src/com/intellij/openapi/actionSystem/impl/ActionUpdater.java#L387

I found that it's caused by this.

The actiongroup will check whether it's children visible. And the check called here.

Why is canceled?

Here's the code of my action group. It's a dynamic group. Source settings state is a PersistentStateComponent saving settings.

My temp workaround is implements the AlwaysVisibleActionGroup.

package net.kaiba.source.settings;

import com.intellij.openapi.actionSystem.ActionGroup;
import com.intellij.openapi.actionSystem.AlwaysVisibleActionGroup;
import com.intellij.openapi.actionSystem.AnAction;
import com.intellij.openapi.actionSystem.AnActionEvent;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.ArrayList;
import java.util.List;

public class ServerActionGroup extends ActionGroup implements AlwaysVisibleActionGroup {

    @NotNull
    @Override
    public AnAction[] getChildren(@Nullable AnActionEvent e) {
        List<AnAction> anActionList = new ArrayList<>();
        for (int i = 0; i < SourceSettingsState.getInstance().serverList.size(); i++) {
            SourceSettingsState.Server server = SourceSettingsState.getInstance().serverList.get(i);
            ServerAction serverAction = new ServerAction(server.name, i);
            anActionList.add(serverAction);
        }
        return anActionList.toArray(new AnAction[0]);
    }
}