[REG] WebEngineView and showMaximized()

Consider this simple application:{}

#include <QApplication>
#include <QMainWindow>
#include <QWebEngineView>auto main(int argc, char * argv[]) -> int
{
    auto Application = QApplication{argc, argv};
    auto MainWindow = QMainWindow{};
    auto WebEngineView = QWebEngineView{&MainWindow};
    
    MainWindow.setCentralWidget(&WebEngineView);
    MainWindow.showMaximized();
    
    return Application.exec();
}

This will not show the MainWindow as maximized as you would expect. Since I'm getting this error on Windows and Linux, I don't think it has anything to do with a window manager.

Interestingly, on Windows, I get a maximized window flicker and then it immediately goes back to the small default size window.

Additionally, if I load some web page in the WebEngineView before calling showMaximized(), I get a maximized window. If I load the web page after showMaximized(), the window is not maximized. If I call showMaximized() again, after loading the page, I get a maximized window.