--- b/src/gui/kernel/qwindow.cpp	2023-11-15 13:58:42.000000000 +0100
+++ a/src/gui/kernel/qwindow.cpp	2024-01-02 12:25:45.961837300 +0100
@@ -1795,8 +1795,13 @@
     d->positionPolicy = QWindowPrivate::WindowFrameExclusive;
     if (d->platformWindow) {
         QScreen *newScreen = d->screenForGeometry(rect);
-        if (newScreen && isTopLevel())
+        if (newScreen && isTopLevel()) {
+            if (d->platformWindow->isEmbedded()) {
+                d->platformWindow->setGeometry(QHighDpi::toNativePixels(rect, newScreen));
+                return;
+            }
             d->setTopLevelScreen(newScreen, true);
+        }
         d->platformWindow->setGeometry(QHighDpi::toNativeWindowGeometry(rect, this));
     } else {
         d->geometry = rect;