gtk_window_move() does not work on OpenSuse 15.5 64 bits GTK 3.0

Question

It seems as gtk_window_move() no longer works on OpenSuse 15.5 64 bits using GTK 3.0

Is there a way to make it work ?

many thanks

#include <gtk/gtk.h>

static void activate(GtkApplication *app, gpointer user_data) {
    GtkWidget *window = gtk_application_window_new(app);
    gtk_window_set_title(GTK_WINDOW(window), "GTK3");
    gtk_window_set_default_size(GTK_WINDOW(window), 400, 100);
    gtk_window_move(GTK_WINDOW(window), 100, 100);
    gtk_widget_show_all(window);
}

int main(int argc, char **argv) {
    GtkApplication *app;
    int status;
    app = gtk_application_new("org.example.windowposition", 
                            G_APPLICATION_FLAGS_NONE);
    g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);
    status = g_application_run(G_APPLICATION(app), argc, argv);
    g_object_unref(app);
    return status;
}

Build it this way:

gcc `pkg-config --cflags gtk+-3.0` `pkg-config --libs gtk+-3.0` test.c -otest