Popups are slow on windows

[Creaperdown]

Hey, I am currently in the process of porting an application from Linux to Windows. The performance is great on Linux, but I realized that switching between pages (so, loading new pages) of my application is quite slow on windows.
I have used the Qml Profiler to check what is going on, and I saw that by far the most time is spent rendering Popups on these pages, that are not opened.
For some reason, it seems like they are directly rendered when opening the page, even though they are not opened.

I wouldn't be sure what code to provide, since it happens for literally every popup. They all start as follows:

Popup
{
    id: root
    // Set width and height

    background: Rectangle { radius: 6; color: Style.colorPopupBackground }
    modal: true
    Overlay.modal: Rectangle { color: Style.colorPopupDim; opacity: 1 }

    ...
}