I am having multiple issues with my LeTV Super4 X65. These issues include:

-Optical audio out to sound bar sometimes stops working. I have to completely power off the TV and turn it back on for it to work again.

-Sometimes on bootup from powered off, I get an error message saying "Process system isn't responding. Do you want to close it? Wait, Report, OK" I have reported the error. I can eventually dismiss this message, but when this happens, apps like Netflix don't work.

-Sometimes the sleeping or powered off TV will not wake up when I press the power button, I have to unplug the TV and plug it back in to reset.

-When my Playstation 4 is connected via HDMI to the TV, the TV does not output dolby digital bitstream over optical to the soundbar. I checked the PS4 audio output settings, and it is configured correctly, and works when optical is connected directly to from the PS4 to the soundbar. My Xbox One has the same audio output settings, is connected to the TV via HDMI, and the TV will successfully output dolby digital bitstream over optical to the soundbar. The TV will also output dolby digital bitstream over optical to the soundbar for built-in apps like Netflix. The problem is specific to PS4, but I know the PS4 is configured correctly.

Is it possible to roll back to a previous, more stable, EUI version?