Boot to Qt 6.10.0 RC (meta-qt6 SHA1: 16797fcbcde399c2c858c119cbf3b79f15eed9a2)

Steps to reproduce:

Install e.g. Boot to Qt 6.10.0 RC raspberrypi image

Setup the device and build and run multimediawidgets/player example

Open video file

Press 'play'

Expected result:

The video is played

Actual result:

The video itself gets played (at least on raspberrypi, but not e.g. on stm32mp15-disco), but is blinking and the video is not displayed on the video window, and the control items are showing through the video stream. Also on raspberrypi if one has a mouse attached and one is moving the mouse to the video window, the application window gets totally black and is shown only after you move the mouse away from the video window. (By "video window" the black window on the top of the application is meant. See the screenshot)

See screenshots attached.