I knew there was major memory leaks with this OS. Unreal that LG hasn't patched this yet. Shame on them. This happens to me, when watching Netflix, Amazon, or DLNA after a few shows. Its so bad, that I literally have to wait 10 seconds before it registers a click. You know the only solution, turn the TV off for about 20 seconds and start again. Basically, rebooting your TV. Its pretty pathetic that you should have to reboot your TV after watching a few shows.
I have heard they are releasing WebOS 2.0 on their 2015 model TV's. They say the OS is fast. I certainly hope that they allow the 2014 TV's to upgrade to 2.0.