Casting to my Bravia TV KD43XH 8196 stopped working in august. It has worked since the TV was new.!
It is on my local network with ethernet. I upgraded SW to 6.6152 a week ago. Same result.
I cast from my Xperia phone (XQ AS52) . Android #12
The problem i not the phone. I can cast to another older Sony TV in my house.