I suspect it has something to do with Chrome's latest version, 46.xx
I get occasional blackouts on yahoo but only on yahoo, no other site. For a second or two the entire page except the borders go black and it doesn't render correctly. I have to mouse over certain areas to clear it.
On a side note and I think even weirder is seeing ads on the home page advertising downloading Windows 7 for $99.00. Who is going to dl Win 7?