Annoying blinking whenever effect is applied

during segmentation I’m getting this annoying blinking whenever effect is applied like the model disappears and returns in seconds. sometimes less sometimes more. first time i thought i deleted the segment. mostly noticed with smoothening brush

Which Slicer versions do you experience this with? Can you check both latest stable and preview releases? Can you take a screen capture video of it?

im using 4.13 2-16

the newer version has some installation issue i couldn’t solve so im back to this one .

ill try to take video but its not all the time