kwin_x11 using 100% of one cpu

hi,

since updating to kwin5-5.7.0-143.1.x86_64
kwin_x11 takes 100% of one cpu

does anyone know how to rectify this?

cheers

os:
Kernel: 4.1.26-21-default x86_64 (64 bit)
Desktop: KDE Plasma 5.7.0 Distro: openSUSE Leap 42.1
Quad core AMD Phenom II X4 940 (-MCP-) cache: 2048 KB
clock speeds: max: 3000 MHz 1: 1800 MHz 2: 1800 MHz 3: 1800 MHz 4: 3000 MHz

ps.

ignore the above

do not know why but after cold-boot all is back to normal