[closed] GTK render bug on Linux & Windows, 1.12.4

Hi,
I'm reporting the following bug, in case it was not reported before.
It happens exactly the same in Linux, GTK2 and GTK3, and in Windows, (no VM) for latest 1.12.4 .
I did not try the QT version, since I don't like the QT.

The bug is this: the whole gui window just disappears sometimes (randomly) during live capture.
The workaround to make it appear again, is this: press F10, menu, move with cursors to Zoom options, select any.
I repeat, it happens pretty randomly, so I can't provide any steps to reproduce it.
But here a link to a screen shot, how it looks like under Windows XP:
bug

Greetings