Hey Hockey and Aslain, I just wanted to give an update on my own account: It seems to happen only when I view a tank being killed and a majority of the times it's been happening from JPG e100s... 2/3 times I killed that tank today, I've bugged out.
Other than that, its really random and is often followed by screen tearing where my screen is divided in half (left and right side) and flickers...