I've gotten a photo with flare not blocked at the top. If you are a person who likes to put flare in your image you have to be aware of this issue with the D750. Aware of this issue you can work around it. A circular polarizing filter will also fix the issue. I recommend a CP filter for taking photos in bright sunlight.
Put another way: It's important that you know about this issue but once you know about it it's not important.

I saw the blocked flare in another photo I took and tilted the camera a little to get this one.
This forum is full of people who fail to acknowledge actual issues with Nikon cameras. Have a look at some of the pictures people are posting in this thread, a camera of this price (of any price) should not do this, it's a design failure, end of. I'd ask for money back.
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>> This forum is full of people who fail to acknowledge actual issues with Nikon cameras.
There is an issue. I acknowledge it.
>>Have a look at some of the pictures people are posting in this thread, ...
The pictures show that when there is too much flare some of the flare is blocked.
>>a camera of this price (of any price) should not do this,
It would be better if the blocked flare was there so we could debate how to take better pictures with and without flare...
>>, it's a design failure, end of. I'd ask for money back.
You have a right to your opinion, but it doesn't work for me. I sold a D700 and a film scanner to buy my D750. I am not going to return it because it can't handle too much flare, design flaw or no. As the test picture I included shows, I can introduce flare into the picture without the issue. If I want to introduce more flare I can use a circular polarizing filter. I can make the D750 do everything I want to do with flare. If I returned the D750 I would not have any camera, and that would be a lot worse.
Damn, after my idiot SWAGs I thought I was done.