I have created a MacOS menubar app that when clicking on the menuitem, opens a popover. All is well, except that occasionally the popover will instead open up as an actual window. A lot of this code is what I've seen in different tutorials/examples of menubar apps.

I haven't been fully able to reliably reproduce, but I suspect that it has to do with some kind of race condition. In my content view, I fire off a request to load data from a URL. When that data has returned, I update the app state to display that data instead of a loading screen. Nothing particularly interesting in the ContentView.

        // popover created in AppDelegate.applicationDidFinishLaunching

        var popover = NSPopover.init()
        popover.behavior = .transient
        popover.contentSize = NSSize(width: 450, height: 300)
        popover.contentViewController = NSHostingController(rootView: contentView)

        // show/hide toggle of popover created like this
        @objc func togglePopover(_ sender: AnyObject) {
        if popover.isShown {
            hidePopover(sender)
        } else {
            showPopover(sender)
        }
    }

    func showPopover(_ sender: AnyObject) {
        if let statusBarButton = statusItem?.button {
            popover.show(relativeTo: statusBarButton.bounds, of: statusBarButton, preferredEdge: NSRectEdge.maxY)
        }
    }

    func hidePopover(_ sender: AnyObject) {
        popover.performClose(sender)
    }

There are no calls to create an NSWindow anywhere in my app, so I'm bit confused.

I am very new to Mac development and SwiftUI. Be gentle, thanks :)