Hi Just saw this!
Well it partially fixed the problem. Meaning, It worked! but the audio cut out again after a week.
Only this time I can just deactivate Netflix and re-login and everything works again. Before this I had to factory reset which was horrible.
So here is the fix -
Go into the Home Menu, Other, Settings, Video, HDMI output
You will see a setting called Deep Color Output. Turn this OFF. (Netflix Audio should now work again)
Hopefully this works for you. If it does and audio stops working again after a few days or week, all you have to do is go into Netflix on your blue ray.
In that main browsing page hit.
Up, Up, Down, Down, Left, Right, Left Right, UP, UP, UP, UP
A menu will pop up to deactivate your account. Click on it. Then log back into Netflix. You will have to re-enter you email and password. This will fix the audio again. It sucks, but its much better than having to do a factory reset and type Everything in again!
I know what your thinking, some developer played Contra way to much when they were younger. The good news is its pretty easy to remember after you do it a few times. Seriously though they could have just put this in a dam menu for Netflix!!!!
So its not 100 percent solution but I really hope this info helps. It took me forever to figure it all out. I spent a week scouring the Net to get this fixed.
Also Panasonic really needs to get the dam bugs out of there Netflix software. Its ridiculous. I actually told them they should hire a different company to design the Internet part of there software as from what I can tell everyone complains about it in reviews. Its slow clunky and counterproductive. At least the other software seems to work just fine though. beside the clunkyness of it.