Hi, I've got the same issues with my MU6409 Samsung TV and Netflix.
I've already spent hours with both Netflix and Samsung support without success.
Link to my post in the Samsung community:
Do you have any solution?
This does 'appear' to be a data supply problem. I think I have similar problems on my samsung ue60, which I'm attwempting too ...
'If I were you' (what I'm doing)
1 connect TV via ethernet cable - you'll get a far faster and better quality signal (without the duplication of wi-fi)
2 Asertain speed of router/hub (I've just got a new gigabit talktalk router - which to benefit from fully on PC had to install an additional card)
3 Use TV browser on youtube to test signal .. search for '4K' - you'll get a list of videos in 4K quality
If these play fine (for their duration) without freezing then you've a better signal than I
In addition to my router I also have a 'Whitebox' to monitor signal. I've moved ethernet cable for TV from whitebox back to router to see if thats the bottleneck in my signals supply (I'm still on point 3 - I'll let you know!)
I have the same error, I have tried to reinstall the Netflix app and turn off/on the Samsung but the problem remains, seems to be a common problem but neither Netflix nor Samsung are giving any effective solution.