kotlin - Swing JFrame does not work well with tiling WM - Stack Overflow

I have created a basic window in Swing using Kotlin and I have an issue when displaying when I'm in Hyprland. The window sometimes starts as a floating window and sometimes it starts tiled. No idea what could cause this.

Here is what I have so far implemented in my window class:

class Window: JFrame() {
    private val displayMode = GraphicsEnvironment.getLocalGraphicsEnvironment().defaultScreenDevice.displayMode
    private val transform = GraphicsEnvironment.getLocalGraphicsEnvironment().defaultScreenDevice.defaultConfiguration.defaultTransform
    companion object {
        private const val DEFAULT_TITLE = "Main WIndow"
        private const val BORDER_RATIO = 0.15
        private const val WINDOW_RATIO = 1 - BORDER_RATIO * 2
    }

    override fun getPreferredSize(): Dimension? {
        setDefaultLocale(null)
        return Dimension(displayMode.width, displayMode.height)
    }

    override fun getBounds(): Rectangle {
        val screenHeight = (displayMode.width / transform.scaleY).toInt()
        val screenWidth = (displayMode.width / transform.scaleX).toInt()

        return Rectangle(
            (screenWidth * BORDER_RATIO).toInt(),
            (screenHeight * BORDER_RATIO).toInt(),
            (screenWidth * WINDOW_RATIO).toInt(),
            (screenHeight * WINDOW_RATIO).toInt()
        )
    }

    override fun getName(): String? = DEFAULT_TITLE
}