I came across this thread one week ago and almost decided that this problem was not being resolved and I would have to put up with signing in to Netflix on my Samsung Smart TV (purchased in September) each time.
However, I noticed that one contributor has stated that s/he does not have to sign in to Netflix each time if s/he exits the Nextflix app using the 'return' key on the Samsung remote.
I have been doing this for the last week: using the 'return' button on my Samsung remote, pressing return 2-3 times until I get to the Netflix screen which says 'Do you wish to exit Netflix' and then choosing yes.
Since I started doing this, I have been able to access Netflix each time I have tried (10- 15 times) without being asked to sign in. NOTE: I have only been using Netflix or TV in this past week (not any other app.)
So this may be worth trying. Tell others here if it works, and don't bite me if it doesn't....:)
