I guess 3 times is a charm. I had 16-35mm attached to D800e and both were stored for over a week in the bag. Few days ago I wanted to take few pictures after the break and I could not remove 16-35mm from the camera. It would just rotate back and forth but not come out. Finally, I was able to remove it in one spot but then I looked in the viewfinder it was a lot of dirt on the screen and viewfinder was dark. The reason it was dark is because there is a lever that got stuck just below the mount. I touched this lever and it sprung back and viewfinder became bright again and I was able to take few hundred pictures.
Now, I need to take the camera to Nikon for a check up but I can't reproduce most problems I have.