Blinking QLineEdit with frame on Windows 8.1 (Vista style only), custom palette

Hi folks,

I noticed very annoying visual bug on Windows 8.1 with QLineEdit.
When passing over QLineEdit with the mouse cursor it becomes white and after short period ( some msecs ) it is displayed correctly.
This is noticed ONLY on Windows 8.1 , on Windows 7 everything is ok.
A way to avoid the blinking I must disable the "frame" for the QLineEdit.
This is happening in both Qt Creator and on the working application.
I had change the whole palette with no white color in it.
Is it possible some stylesheet property to cause this?
But I repeat this is happening only on Windows 8.1 and not on Windows 7 with the same code.

Regards,
pecuna