I'm sorry to hear of your frustration with this! From the description of the symptoms you're experiencing it sounds like the television is not receiving a good signal. For the TV, it has a maximum range of 50 feet, but we recommend that the range be 25 feet or less with a clear line of sight to get the best signal without bandwidth loss. If you are not getting the proper signal or speed into the television you can experience app crashes, freezing of apps, and buffering.
As long as your firmware is up to date, you can try resetting the smart hub as well. If it continues to do the same thing at that point the explanation would be the network.
-- HD Tech
I am so very frustrated with trying to get Netflix to work on my Samsung Blu Ray Player. I have been bounced between my wireless provider, Netflix, and Samsung. Nobody seems to be able to help me. Today Samsung helped me get the current update but after the update was done still could not get Netflix to stream in an entire movie I was always restarting it. I have a Samsung Blu Ray Player model BD_f5900, last time I spoke to Netflix they said the app is provided by Samsung so I a hoping somebody can help me. Also it is showing 4.0.3 which Netflix says that is my problem.