Linux Ubuntu 22.04 
Qt Creator 12.0.0
Device: Raspberry Pi4 64 bit 

Steps to reproduce:

1. Open example app (or any other example with widgets dialog) - https://doc.qt.io/qt-6/qtwidgets-dialogs-standarddialogs-example.html 
2. Run it on Raspberry Pi 4 64bit using the Wayland platform
3. Open any dialog several times and notice its position on the screen.

Expected: The dialog should be displayed always in the same place.

Actual: The dialog is displayed each time at different position.

Reproducibility:  100%

NOTE: The issue is not reproducible when using EGLFS platform.