Cocoa Autolayout issue - NSTextView inside a custom NSView

Question

I'm currently writing a Cocoa app, in Swift to exercise the language. I'm not too familiar with the AppKit framework yet, but now I bumped into an interesting problem.

It simply contains an NSWindow, and my custom NSView inside. With autolayout I control the size of the NSView, depending the resized window.

Base structure

As for my custom view, I'd like to have my NSView as a container, and I have an NSTextView inside it.

import Foundation
import AppKit

class Fucky2View: NSView 
{
    var textView : NSTextView!

    required init?(coder aDecoder: NSCoder) 
    {
        super.init(coder: aDecoder)
        commonInit()
    }

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

    func commonInit()
    {
        print("initing")

        self.wantsLayer = true
        self.layer?.backgroundColor = NSColor.red.cgColor

        textView = NSTextView.init(frame: self.bounds)
        self.addSubview(textView)

        self.translatesAutoresizingMaskIntoConstraints = false
        textView.translatesAutoresizingMaskIntoConstraints = false

        textView.leftAnchor.constraint(equalTo: self.leftAnchor).isActive = true
        textView.rightAnchor.constraint(equalTo: self.rightAnchor).isActive = true
        textView.topAnchor.constraint(equalTo: self.topAnchor).isActive = true
        textView.bottomAnchor.constraint(equalTo: self.bottomAnchor).isActive = true

    }

    func displayText(_ text : String)
    {
        let attrStr : NSAttributedString = NSAttributedString(string: text+"\n") 
        textView.textStorage?.append(attrStr)
    }
}

So I just want to keep the NSTextView as same size as the view itself. I colored the view background to red, to see if its filling properly, but this is what happens: https://www.youtube.com/watch?v=LTQndoGzzEM

The textview's height is sometime set properly, but most of the times not.

I recreated the same exact app with UIKit, UIViewController, UIView and UITextView, tested on iPhone (I resized the screen with rotation), and this was working correctly.

Do anyone has any idea? I played along with priorities, but did not helped. Tried several things from NSView, concurrent draw, etc, did not helped. Tried with NSLayoutConstraint instead of anchors, no change. The only thing was if I set the TextView's frame in the custom NSView's drawRect: method, but I would like to do a nicer solution.

Or has anyone any other idea? macOS Sierra 10.12.6, XCode 9.2

Thanks