Well done for perusing this. I have the same problem and its a disgrace that LG sell these TV's with this obvious problem.
I got my 65 inch "Smart" from a shop here in Malaysia, they gave me all the usual lies about how great the TV was and how easy you can stream movies on the TV. So after 2 or 3 days when I started getting the "This app will now restart to free up more memory" message I was shocked.
The shop told me that they would not give me a refund, they would only send some guy out to reset the TV back to factory default. Waste of time. LG's "customer service" was a total failure. They said that they would come and change the mother board, but when prompted, they admitted that this would not solve the problem. I found this a little strange, because up to that point, they maintained that they were not aware of this problem. So not sure how they came to the conclusion that this would not fix the problem that they were not aware of.......?
The only thing more shocking than the fact that I fell for the bullshit about how great these TV's are, is the total and absolute lack of support and help from LG. They are some of the worst "customer service" I have ever experienced... ever. They have your money so f..k you.