Mid 2015 rMBP 15 with AMD : Screen quickly Fade Out / Fade in

Hi,

I have a rMBP 15 mid 2015 with AMD graphic card.

For exemple, when a navigate in tabs of the apple web page of the iPhone 6S (3D touch - Design - Cameras - Technology - iOS 9 - Tech specs), the screen goes to black and come back, as if i change de screen resolution or plug in a external screen (monitor detection)

It does this only in safari (not FireFox for example), it does it on another user account, on another system boot (external)

I see the same problem on the exact machine (a refurbished one)

For people who have the same Mac (15" Retina mid 2015 with AMD), have you the same thing while doing this scenario ?

thank you

Thomas