Hi, I have also issues with Youtube/Netflix and the magic remote since the update to version 06.00.25 on my LG 49SJ8109.
Youtube and Netflix have buffering issues and the Video is lagging.
Youtube microphone search disappeared and sometimes the magic remote does not work and only a restart of the TV is solving that.
I guess a downgrade to the firmware 06.00.20 would solve the problem but I cannot find any download link for the firmware version.