Unable to dismiss "NSWindowController" for a Mac app

Question

I have created a menu bar app for Mac. I want to open the app when clicking on menu bar icon. After updating the OS to Ventura (13.4 (22F66)) I am observing an issue where the NSWindowController is getting displayed on launching the app.

I was able to dismiss the window by adding this flag but now it's not working anymore.

Now I am seeing an error in console on launching the app.

[Window] Warning: Window NSWindow 0x119e17510 ordered front from a non-active application and may order beneath the active application's windows.

class AppDelegate: NSObject, NSApplicationDelegate {

    let statusItem = NSStatusBar.system.statusItem(withLength: NSStatusItem.squareLength)

    func applicationDidFinishLaunching(_ aNotification: Notification) {
        statusItem.button?.image = NSImage(systemSymbolName: "book", accessibilityDescription: "Open")
        statusItem.button?.toolTip = "Demo"
        statusItem.button?.target = self
        statusItem.button?.action = #selector(showSettings)
        
    }

    func applicationWillTerminate(_ aNotification: Notification) {
        // Insert code here to tear down your application
    }

    func applicationSupportsSecureRestorableState(_ app: NSApplication) -> Bool {
        return true
    }
    
    @objc func showSettings() {
        let storyboard = NSStoryboard(name: "Main", bundle: nil)
        guard let vc = storyboard.instantiateController(withIdentifier: "ViewController") as? ViewController else {
            fatalError("Unable to find ViewController in the storyboard.")
        }

        guard let button = statusItem.button else {
            fatalError("Couldn't find status item button.")
        }

        let popoverView = NSPopover()
        popoverView.contentViewController = vc
        popoverView.behavior = .transient
        popoverView.show(relativeTo: button.bounds, of: button, preferredEdge: .maxY)
    }

}