Bug 360889

When moving cursor over panel on the components that contains pop-up, graphic artifacts appears - see screenshot in the URL field. It's not very visible when movement is slow but faster breaks screen a lot. Even on other non-primary displays. When moving faster, pop-ups are even shown on different displays and animated. It happens on task manager, systray etc. Seems like the first release I realized this is 5.5.95.

It doesn't matter what compositor method is selected - OpenGL (GLX, EGL), XRender.

Reproducible: Always

Steps to Reproduce:
1. select some component/widget on the panel that shows pop-up (task, systray icon etc)
2. wait for pop-up to appear
3. move quickly over other components that has pop-up (but the same type)

Actual Results:  
Graphic artifacts, even on other displays (not only primary)

Expected Results:  
No graphic artifacts

cat /etc/fedora-release 
Fedora release 23 (Twenty Three)

rpm -q plasma-desktop
plasma-desktop-5.5.95-1.fc23.x86_64

rpm -q qt5-qtbase
qt5-qtbase-5.6.0-7.fc23.x86_64
(same result on qt 5.5 though)

00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 09)

rpm -q xorg-x11-drv-intel
xorg-x11-drv-intel-2.99.917-19.20151206.fc23.x86_64