For some reason, starting yesterday, I cannot display charts for several markets in different browser tabs at the same time. Have to reload every time. This issue started to show in Chrome browser, Firefox seems ok for now. Anyone else?

Symptoms: I usually have several tabs open for Birfinex, Bitstamp, et.c. and going back and forth between them when watching market. Now, if I change anything (like time scale) in one tab and then switch to another tab, screen is all black (no candles displayed at all), unless I refresh (reload). But if I do that and go back to previous tab, I see that now this one is "black"...