QWidget::showNormal() doesn't work if window moved right after

When running the QWidget following code on a maximized window:

showNormal();
move(100, 100);

The widget will get the maximized geometry instead of the normal geometry.
Tested on Ubuntu and KDE.

Testcase attached.

It's also strange that when maximizing the window we get two QWindow::windowStateChanged(MaximizedState) signals emitted, with the same value.

While I understand the reason (1 signal is emitted by Qt, sync, and the other one when the window manager replies, async), it doesn't look like clean API.

Assuming TQC won't fix this, as it's probably hard, what would be a workaround that doesn't involve a timer ? We need a way to know it's safe to call move().