ARSCNView session method is called, but renderer is not.

I'm trying to create custom ARSCNView.

class CustomARSCNView: ARSCNView, ARSessionDelegate, ARSCNViewDelegate {

    override init(frame: CGRect) {
        super.init(frame: frame)
        loadWorldMap()
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
        loadWorldMap()
    }

    override init(frame: CGRect, options: [String : Any]? = nil) {
        super.init(frame: frame, options: options)
        loadWorldMap()
    }

    public func loadWorldMap () {
        let config = ARWorldTrackingConfiguration()
        config.planeDetection = .horizontal
        config.environmentTexturing = .automatic
        self.debugOptions = [ARSCNDebugOptions.showFeaturePoints, .showWorldOrigin]

        session.run(config, options: [.resetTracking, .removeExistingAnchors])
        self.session.delegate = self
    }
}

Everything works pretty cool, any attached session method is called predictably, but unfortunately renderer methods not running at all. Is there any mistake in my code?