swiping up to mission control causes horizontal lines

[clemsy]

Hi guys,

I've noticed in the past couple of days, that whenever I swipe up with four fingers to mission control, I notice a thin horizontal line (across the screen) will flicker on the screen. As soon as mission control is fully swiped, the line disappears, so its very brief.

Any ideas why?

Thanks

 

[motrek]

Hi guys,

I've noticed in the past couple of days, that whenever I swipe up with four fingers to mission control, I notice a thin horizontal line (across the screen) will flicker on the screen. As soon as mission control is fully swiped, the line disappears, so its very brief.

Any ideas why?

Thanks

https://forums.macrumors.com/threads/1735009/