Floating QML Rectangle shows flickering in free-scale overlay buffer

[Arun Menon]

We have one QT quick application which creates a floating QML rectangle.
It runs on free scale board and selected display buffer overlay buffer(i.e frame buffer 1 ).
But, this rectangle shows flickering when we drag it.

Note: We have selected frame buffer 1 using command
export QT_QPA_EGLFS_FB=/dev/fb1
There is no flickering issue when we run it on default display buffer( frame
buffer 0).

Any idea/ suggestion?

Regards,
Arun