Content does not fill NSWindow without titlebar

I'm trying to create a custom NSWindow where I want my content to completely fill the available space, I have managed to hide the navigation bar buttons and title and make it transparent, but when I set the content to fill the available space there is some space at the bottom that is not working

The way I create my window:

  private func createWindow() -> MyWindow {
    let window = MyWindow(
      contentRect: NSRect(x: 0, y: 0, width: 10, height: 10), // these values don't matter, the window expands to the swiftUI view
      styleMask: [.titled, .closable, .fullSizeContentView],
      backing: .buffered, defer: false)
    
    window.titlebarAppearsTransparent = true
    window.titleVisibility = .hidden
    window.isMovableByWindowBackground = false
    window.isReleasedWhenClosed = false
    window.collectionBehavior = [.transient, .ignoresCycle]
    window.standardWindowButton(.closeButton)?.isHidden = true
    window.standardWindowButton(.zoomButton)?.isHidden = true
    window.standardWindowButton(.miniaturizeButton)?.isHidden = true
    return window
  }

And on my component, I added the following property:

.ignoresSafeArea()

I already followed all the suggestions in this question but nothing seems to work on my case, any help is appreciatted

It looks I've reproduced what you might have

window.contentView = 
  NSHostingView(rootView: 
     Rectangle().fill(Color.red)
       .ignoresSafeArea()                 // << works !!
       .frame(width: 640, height: 480)
    // .ignoresSafeArea()             // << issue when here !!
  )

More findings: no issue even with ignoresSafeArea at the end when to use min W/H instead of strict frame for window, ie.

.frame(minWidth: 640, minHeight: 480)
.ignoresSafeArea()