Qt6 crash with weston use-g2d=1

      We have NXP imx8mp BSP 5.15.52_2.1.0 (using Qt 6.3.2) and run qt browser and qt virtual keyboard. We would restart qt browser and qt virtual keyboard several times, then weston shows " ensure_suface_buffer_is_ready: Warning :wait for fence fs=49". We found that this occurs when use-g2d=1. This doesn't occur when use-g2d=0.

     We used BSP 5.4.47_2.2.0 , use-g2d =1 and qt5.15.0. We didn't see same symptom. We would like to know what is different about use-g2d between Qt5.15.0 and Qt6.3.2.

Note : This symptom occurs very quickly when we enable blur using the qt virtual keyboard feature. We guess whether there is a conflict between the use-g2d function and the blur function in BSP 5.15.52 and QT6.3.2.
But disable blur , we would need to restart hundreds of times qt browser and qt virtual keyboard. We could see weston freeze.