I love the brand, so this is hard to say, but don't waste your money on their high end TVs until they provide a fix. Don't waste time contacting their useless support either. It is not a Netflix problem so don't let Samsung try to convince you it is Netflix's problem.
I've had a few high end models of your smart TVs and the same problem persists. I have tried all recommended solutions including resetting smart hub, resetting TV, reinstalling a the preinstalled app by fiddling with location settings where Netflix isn't available. I've even taken the device off of wired network to wifi only. Most of those solutions work for a week or so then the problem is back. The Netflix app works fine on my Nvidia TV and all other apps work fine. So it is only related to Netflix and using a Samsung device. Your support experts don't seem to be aware of the issue nor how to fix it even though if you look at several of your forums as well as other expert forums such as CNET, it seems to be wide spread. You should probably start taking it seriously and developing a solution because you are losing customers hand over fist. I have your Q7F model, I've had your 9000 series and the frame TV and the problem affected all of them. I'm not longer wasting thousands of dollars on your supposedly amazing TVs because you don't fix the problem. It's a shame because you have one of the best pictures but I've been fooled more than three times now and thousands of dollars later.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic