Black lines observed on rectangle if used as a listview delegate running with linuxfb platform.

Hi,

We are using Rectangle inside the list view delegate to draw divider line. When the delegates are scrolling we are observing the black lines on top/bottom of the divider lines.
We are using Qt 6.8.0 and I am attaching the sample project which we have tried running on the device and able to reproduce the issue. 

Key Observations:
1. We have used some seperators(red color lines in the attached application), in the IMX6 device, we are seeing the seperator lines only when we are scrolling the view/delegates.
2. The issue is not reproduced in the ubuntu which we tried running on our computers, Issue is observed in the Device only with platform linuxfb.
3. The Black lines are not visible in the initial load of the component, the lines are observed only when scrolling the list view(attached a video to demo the behaviour).

Note: The issue is observed if we launch the application with argument "./app -platform linuxfb". The same application in the same device, running with out the argument will not reproduce the issue. We are using Freescale IMX6. We are not getting any error messages when the application is running.