A temporary solution for this problem, until it is fixed, can be to simply use a different browser than you normally do Well i have tried opera, edge, internet explorer (normal) chrome and firefox, is there another one?
It works almost on facebook but I play 99% of the time on king.com. In facebook it gets jagged lines and the playing area becomes totally covered after a couple of games. King.com i get the update browser screen. Refreshing the page, emptying internet cache and temp files does nothing.