Pink and Blue artefacts appearing in the notification centre Hi I just got the new MacBook and installed Mac OS sierra on it.

I keep coming across an issue whereby there are pink and blue pixelated diagonal lines appearing in the notification centre and when I try to screenshot them they go away. 

Attached is an image I took with my iPhone as was not working
I do have exactly the same artefacts on MacBook 2016 1.2 Ghz.
They appearing when there's some window under the notification centre. Can be seen on FaceTime app window sometime as well.

Looks like a software/driver issue so far.

Update: 
Tried it with clean install of El Capitan — it's not there, everything is ok. So it is a Sierra bug. Reported it to Apple via Bug Reporter as a 10.12 bug.