hidesBottomBarWhenPushed is not working when using UIPageViewController swift

Question

My app UI hierarchy look like shown in the picture below.

When I try to push UIViewController for 1st tab it doesn't hide tabbar even hidesBottomBarWhenPushed = true. It works well for 2, 3, 4 tab, when hidesBottomBarWhenPushed = true. How can I solve it? I have tried, but it only works like described above:

override var hidesBottomBarWhenPushed: Bool {
    set {
        super.hidesBottomBarWhenPushed = newValue
    }
    get {
        return true
    }
}